Free Online Tools by WaflApp

Character Count Tool

Count characters, words, lines, and byte length in your text.

Spell Checker

Use this spell checker to prepare resumes, interviews, pay, or career documents in your browser.

Spacing Checker

Use this spacing checker to prepare resumes, interviews, pay, or career documents in your browser.

Language Converter

Use this language converter to prepare resumes, interviews, pay, or career documents in your browser.

Loanword Converter

Use this loanword converter to prepare resumes, interviews, pay, or career documents in your browser.

Resume Shortener Tool

Use this resume shortener tool to prepare resumes, interviews, pay, or career documents in your browser.

GPA Converter

Use this gpa converter to prepare resumes, interviews, pay, or career documents in your browser.

Net Pay Calculator

Use this net pay calculator to prepare resumes, interviews, pay, or career documents in your browser.

One-Minute Self Introduction Timer

Use this one-minute self introduction timer to prepare resumes, interviews, pay, or career documents in your browser.

Job Photo Size Converter

Use this job photo size converter to prepare resumes, interviews, pay, or career documents in your browser.

STAR Answer Generator

Use this star answer generator to prepare resumes, interviews, pay, or career documents in your browser.

Interview Relaxation Tool

Use this interview relaxation tool to prepare resumes, interviews, pay, or career documents in your browser.

Resume Talent Profile Analyzer

Use this resume talent profile analyzer to prepare resumes, interviews, pay, or career documents in your browser.

Resume Penalty Keyword Filter

Use this resume penalty keyword filter to prepare resumes, interviews, pay, or career documents in your browser.

Career Total Calculator

Use this career total calculator to prepare resumes, interviews, pay, or career documents in your browser.

Military Service Period Calculator

Use this military service period calculator to prepare resumes, interviews, pay, or career documents in your browser.

iPhone HEIC to JPG Converter

Convert iPhone HEIC or HEIF photos into JPG files.

WEBP to JPG Converter

Convert a WEBP image into a JPG file.

Image to WEBP Converter

Convert an image into a WEBP file.

PNG to JPG Converter

Convert PNG images to JPG or JPG images to PNG in your browser.

SVG to PNG Converter

Convert an SVG file into a PNG image.

Favicon ICO Generator

Create a simple ICO favicon file from an image.

Image to Base64 Converter

Convert an image file into a Base64 data URL.

Photo Compressor

Compress a photo into a smaller JPG download.

Photo Crop

Crop the center of a photo to a selected ratio.

Photo Merger

Merge multiple photos horizontally or vertically.

Photo Rotate and Flip

Rotate and optionally flip a photo.

Watermark Tool

Add a text watermark over an image.

Black and White Sepia

Convert an image to grayscale or sepia.

Circle Profile

Crop an image into a circular profile shape.

Brightness and Contrast Correction

Adjust image brightness and contrast in your browser.

Color Extractor

Extract approximate dominant colors from an image.

Instagram 9 Grid

Split an image into a 3 by 3 grid for social posts.

Add Text to Photo

Add centered text to an uploaded photo.

ID Photo Maker

Place an image on a simple ID photo canvas.

Image Compare

Create a side-by-side comparison from two images.

Full Image Mosaic Pixelate

Apply a mosaic pixelation effect to the whole image.

Color Invert Negative

Invert image colors to create a negative effect.

Photo Blur

Apply a blur effect to a photo.

Add Photo Border

Add a solid border around a photo.

Transparent Background Fill

Fill transparent pixels with a selected background color.

Square Image Maker

Place an image on a square canvas.

Rounded Corners Maker

Round the corners of an uploaded image.

Thumbnail Maker

Create a thumbnail-sized version of an image.

Ratio Crop

Crop the center of an image to a selected ratio.

Custom Image Resize

Resize an image to a custom width and height.

ASCII Art Converter

Convert an image into ASCII art text.

Image Compressor

Prepare a lower-quality JPEG download from an image.

Photo Flip Horizontal Vertical

Flip an image horizontally, vertically, or both.

Saturation Adjuster

Adjust image color saturation.

Hue Changer

Shift image hue by degrees.

Vignette Effect

Add a dark vignette around the image edges.

Black and White Threshold

Convert an image to black and white using a threshold.

White Background to Transparent Maker

Make near-white pixels transparent.

Duotone Effect

Convert an image to a two-color duotone effect.

Meme Caption Maker

Add bold top and bottom meme captions to an image.

Photo to ASCII Converter

Convert a photo into text-based ASCII art.

Photo Sharpen

Apply a simple sharpening filter to an image.

Emboss Effect

Apply an emboss effect to an image.

Posterize Color Simplify

Reduce image colors for a posterized effect.

Color Temperature Adjuster

Adjust image warmth or coolness.

Gamma Correction

Adjust image gamma to change the brightness curve.

Film Grain Noise

Add film grain noise to an image.

Polaroid Frame

Add a polaroid-style frame and caption.

Photo Frame Border

Add a clean frame border around a photo.

Photo Date Stamp

Add a date stamp near the bottom of a photo.

Gradient Overlay

Add a gradient color overlay to an uploaded image.

Text Image Card

Create a text image card with custom colors.

Photo Collage Maker

Create a simple photo collage from multiple images.

Image Grid Split

Split an image into a grid of downloadable tiles.

Photo to PDF Converter

Create one PDF from multiple image files in your browser.

PDF Merger

Merge multiple PDF files into one PDF in the order you choose.

PDF Splitter

Split a PDF into separate page files for download.

PDF Rotator

Rotate all PDF pages or only selected pages by the angle you choose.

PDF to Image Converter

Convert each PDF page into image files for download.

PDF Text Extractor

Extract selectable text from a PDF file.

PDF Compressor

Compress a PDF by rebuilding pages as images to reduce file size.

PDF Page Number Tool

Add page numbers to the bottom of PDF pages.

PDF Page Remover

Remove selected pages from a PDF and save a new file.

PDF Page Extractor

Extract selected pages from a PDF into a new file.

PDF Watermark Tool

Add a custom watermark text to the center of PDF pages.

Case Converter

Use this case converter to analyze, extract, convert, or clean text directly in your browser.

Text Cleaner

Clean extra spaces, repeated spaces, and excessive blank lines.

Lorem Ipsum Generator

Generate placeholder text for design, publishing, and layout tests.

Reverse Text Converter

Use this reverse text converter to analyze, extract, convert, or clean text directly in your browser.

Line Numbering Tool

Use this line numbering tool to analyze, extract, convert, or clean text directly in your browser.

Thousands Comma Converter

Use this thousands comma converter to analyze, extract, convert, or clean text directly in your browser.

Emoji Collection

Use this emoji collection to analyze, extract, convert, or clean text directly in your browser.

Text Repeater

Use this text repeater to analyze, extract, convert, or clean text directly in your browser.

Shuffle Line Order Tool

Use this shuffle line order tool to analyze, extract, convert, or clean text directly in your browser.

Find and Replace Tool

Use this find and replace tool to analyze, extract, convert, or clean text directly in your browser.

Line Sorter

Use this line sorter to analyze, extract, convert, or clean text directly in your browser.

Trailing Space Remover

Use this trailing space remover to analyze, extract, convert, or clean text directly in your browser.

Wrap Lines with Text Tool

Use this wrap lines with text tool to analyze, extract, convert, or clean text directly in your browser.

List to One Line Converter

Use this list to one line converter to analyze, extract, convert, or clean text directly in your browser.

Duplicate Line Remover Tool

Use this duplicate line remover tool to analyze, extract, convert, or clean text directly in your browser.

Hashtag Generator

Use this hashtag generator to analyze, extract, convert, or clean text directly in your browser.

Sentence Case Converter

Use this sentence case converter to analyze, extract, convert, or clean text directly in your browser.

Fancy Text Font Converter

Use this fancy text font converter to analyze, extract, convert, or clean text directly in your browser.

Upside Down Text Converter

Use this upside down text converter to analyze, extract, convert, or clean text directly in your browser.

Strikethrough Underline Text Generator

Use this strikethrough underline text generator to analyze, extract, convert, or clean text directly in your browser.

Glitch Text Generator

Use this glitch text generator to analyze, extract, convert, or clean text directly in your browser.

Emoji Remover Tool

Use this emoji remover tool to analyze, extract, convert, or clean text directly in your browser.

Korean Dummy Text Generator

Use this korean dummy text generator to analyze, extract, convert, or clean text directly in your browser.

Reverse Word Order Tool

Use this reverse word order tool to analyze, extract, convert, or clean text directly in your browser.

Text Indent Tool

Use this text indent tool to analyze, extract, convert, or clean text directly in your browser.

Empty Line Remover

Use this empty line remover to analyze, extract, convert, or clean text directly in your browser.

Text Emoticon Collection

Use this text emoticon collection to analyze, extract, convert, or clean text directly in your browser.

Korean No-Ending Style Converter

Use this korean no-ending style converter to analyze, extract, convert, or clean text directly in your browser.

Tab Space Converter

Use this tab space converter to analyze, extract, convert, or clean text directly in your browser.

Markdown Remover Tool

Use this markdown remover tool to analyze, extract, convert, or clean text directly in your browser.

Reverse Line Order Tool

Use this reverse line order tool to analyze, extract, convert, or clean text directly in your browser.

Auto Line Wrap Tool

Use this auto line wrap tool to analyze, extract, convert, or clean text directly in your browser.

Letter Spacing Tool

Use this letter spacing tool to analyze, extract, convert, or clean text directly in your browser.

Shuffle Word Order Tool

Use this shuffle word order tool to analyze, extract, convert, or clean text directly in your browser.

Number Remover Tool

Use this number remover tool to analyze, extract, convert, or clean text directly in your browser.

Text Space Alignment Tool

Use this text space alignment tool to analyze, extract, convert, or clean text directly in your browser.

Character Replace Tool

Use this character replace tool to analyze, extract, convert, or clean text directly in your browser.

Case Converter

Use this case converter to analyze, extract, convert, or clean text directly in your browser.

Image Text OCR

Use this image text ocr to analyze, extract, convert, or clean text directly in your browser.

Text to Speech Converter

Use this text to speech converter to analyze, extract, convert, or clean text directly in your browser.

Text Diff

Use this text diff to analyze, extract, convert, or clean text directly in your browser.

Initial Consonant Extractor

Use this initial consonant extractor to analyze, extract, convert, or clean text directly in your browser.

Hangul Jamo Splitter

Use this hangul jamo splitter to analyze, extract, convert, or clean text directly in your browser.

Word Frequency Analyzer

Use this word frequency analyzer to analyze, extract, convert, or clean text directly in your browser.

Specific Character Count Calculator

Use this specific character count calculator to analyze, extract, convert, or clean text directly in your browser.

Number Extractor

Use this number extractor to analyze, extract, convert, or clean text directly in your browser.

Email Extractor

Use this email extractor to analyze, extract, convert, or clean text directly in your browser.

Reading Time Calculator

Use this reading time calculator to analyze, extract, convert, or clean text directly in your browser.

Initial Consonant Quiz Converter

Use this initial consonant quiz converter to analyze, extract, convert, or clean text directly in your browser.

Korean Particle Converter

Use this korean particle converter to analyze, extract, convert, or clean text directly in your browser.

Korean English Number Extractor

Use this korean english number extractor to analyze, extract, convert, or clean text directly in your browser.

Sentence Splitter

Use this sentence splitter to analyze, extract, convert, or clean text directly in your browser.

Line and Word Counter

Use this line and word counter to analyze, extract, convert, or clean text directly in your browser.

Character Frequency Analyzer

Use this character frequency analyzer to analyze, extract, convert, or clean text directly in your browser.

Hangul Jamo Composer

Use this hangul jamo composer to analyze, extract, convert, or clean text directly in your browser.

Phone Number Extractor

Use this phone number extractor to analyze, extract, convert, or clean text directly in your browser.

Word Counter

Use this word counter to analyze, extract, convert, or clean text directly in your browser.

Palindrome Checker

Use this palindrome checker to analyze, extract, convert, or clean text directly in your browser.

Unique Word Extractor

Use this unique word extractor to analyze, extract, convert, or clean text directly in your browser.

Duplicate Line Finder

Use this duplicate line finder to analyze, extract, convert, or clean text directly in your browser.

Character Limit Checker

Use this character limit checker to analyze, extract, convert, or clean text directly in your browser.

HEX to RGB Converter

Convert HEX colors to RGB or RGB colors to HEX.

Base64 Encoder

Encode plain text to Base64 or decode Base64 back to UTF-8 text.

URL Encoder

Percent-encode URL text or decode encoded URL strings.

Barcode Generator

Prepare a value for barcode generation.

CSV to Excel Converter

Convert CSV to spreadsheet-friendly TSV or TSV back to CSV.

QR Scanner

Read QR code content from an image when the browser supports it.

Markdown to HTML Converter

Convert simple Markdown into HTML.

HTML Entity Converter

Encode or decode HTML entities.

CSV to JSON Converter

Convert CSV rows into a JSON array.

JSON to CSV Converter

Convert JSON objects or arrays into CSV.

Text to Binary Converter

Convert text to binary bytes or binary bytes back to text.

Morse Code Converter

Encode or decode Morse code.

Unicode Converter

Convert text into Unicode code points.

NATO Phonetic Alphabet Converter

Convert text to the NATO phonetic alphabet.

Leet Speak 1337 Converter

Convert plain text into leet speak.

ASCII Table

Show a printable ASCII code table.

Caesar Cipher Converter

Encode text with a Caesar cipher shift.

ROT13 Converter

Encode or decode text with ROT13.

URL Extractor

Extract URLs from pasted text.

Korean Romanization Converter

Prepare Korean text for romanization review.

Text ASCII Code Converter

Convert text characters into ASCII code values.

Hex Text Converter

Convert text to hexadecimal bytes or hex bytes back to text.

Braille Converter

Convert letters into a simple Braille-style representation.

Fullwidth Halfwidth Converter

Convert fullwidth characters into halfwidth characters.

Line Break to HTML Converter

Convert line breaks to HTML br tags.

Unicode Info Viewer

Show Unicode code point information for each character.

CSV Column Extractor

Extract one column from CSV by header name or column number.

List to HTML Converter

Convert line-separated text into an HTML list.

Markdown Link Generator

Generate a Markdown link from text and URL.

JSON Formatter

Format JSON so it is easier to read and inspect.

Password Strength Checker

Check the basic strength of a password in your browser.

Timestamp Converter

Convert between Unix timestamps and readable dates.

UUID Generator

Generate a random UUID v4 string.

Hash Generator

Generate a hash value from text.

Regex Tester

Test a regular expression pattern against sample text.

JWT Decoder

Decode a JWT header and payload so you can inspect the token contents.

Slug Generator

Convert a title or phrase into a URL-friendly slug.

CSS Minifier

Minify CSS by removing comments, extra spaces, and line breaks.

Device and Screen Info Checker

View browser, platform, screen, viewport, pixel ratio, and language information.

Business Registration Number Validator

Validate the format and checksum of a Korean business registration number.

Card Number Validator Luhn

Check whether a card number passes the Luhn checksum.

Character Byte Counter

Count the UTF-8 byte length of text.

Random ID Generator

Generate a random ID string with the length and character set you choose.

JSON Minifier and Formatter

Format or minify JSON data in your browser.

Case Converter

Convert variable names between camelCase, snake_case, kebab-case, and related styles.

Markdown Table Generator

Convert CSV-style text into a Markdown table.

URL Parameter Parser

Parse a URL and view its query parameters in a readable list.

SEO Meta Tag Generator

Generate basic SEO meta tags for a page title, description, and canonical URL.

Open Graph Tag Generator

Generate Open Graph meta tags for title, description, image, and URL.

robots.txt Generator

Create a basic robots.txt file for your site.

Cron Expression Explainer

Break a five-field cron expression into minute, hour, day, month, and weekday parts.

URL Query Builder

Build a URL query string from key=value lines.

Subnet Calculator

Calculate IPv4 CIDR details such as subnet mask, network address, broadcast address, and address count.

Memorable Password Generator

Generate a readable word-based password that is easier to remember.

Code Comment Remover

Remove common code comments from pasted code.

JSON String Escape Tool

Escape plain text as a JSON string or convert an escaped string back.

JSON Key Sorter

Sort JSON object keys for easier comparison and review.

UTM Link Builder

Add UTM parameters to a URL for campaign tracking.

QR Code Generator

Create a QR image from a URL, text, phone number, email, or SMS message.

Special Character Collection

Browse and copy common symbols, arrows, marks, currency signs, and typographic characters.

robots.txt Checker

Create a quick robots.txt check URL for a website.

Punycode Converter

Convert an international domain name to browser-normalized ASCII/Punycode form.

Unicode Info Viewer

Inspect Unicode code points for characters and text.

Length Converter

Convert length between metric and imperial units.

Weight Converter

Convert weight between kilograms, grams, pounds, and ounces.

Temperature Converter

Convert temperature between Celsius, Fahrenheit, and Kelvin.

Pyeong to Square Meter Converter

Convert between pyeong and square meters.

Number Base Converter

Convert numbers between binary, octal, decimal, hexadecimal, and base 36.

Number to Korean Converter

Show a Korean large-number reading for a number.

Roman Numeral Converter

Convert numbers to Roman numerals or Roman numerals to numbers.

Number to English Words

Write a number in English words.

Fuel Economy Converter

Convert fuel economy between km/L, L/100km, and mpg.

Gold Weight Converter Don Nyang

Convert gold weight between grams, don, and nyang.

Traditional Korean Units Converter

Convert traditional Korean reference units with metric values.

Torque Converter

Convert torque between N m, kgf m, and lb ft.

Clothing Size Converter Chart

Compare simple Korean clothing sizes with US and EU reference sizes.

Data Transfer Speed Converter

Convert data transfer speeds such as Mbps, MB/s, Gbps, and KB/s.

Concentration Unit Converter ppm

Convert concentration between ppm and percent.

Slope Converter

Convert slope between percent grade and degrees.

Fraction Decimal Converter

Convert fractions to decimals or decimals to simplified fractions.

Latitude Longitude Coordinates Converter

Convert latitude and longitude decimals into DMS coordinate notation.

Chinese Numeral Converter

Convert Arabic digits into Chinese numeral characters.

Area Unit Converter

Convert area between square meters, pyeong, square feet, acres, and hectares.

Volume Unit Converter

Convert volume between liters, milliliters, gallons, and cubic meters.

Speed Unit Converter

Convert speed between km/h, m/s, mph, and knots.

Data Size Unit Converter

Convert digital storage units from bytes through terabytes.

Time Unit Converter

Convert time between seconds, minutes, hours, days, and weeks.

Pressure Unit Converter

Convert pressure between Pa, kPa, bar, atm, and psi.

Energy Unit Converter

Convert energy between joules, kWh, kcal, and calories.

Power and Horsepower Unit Converter

Convert power between watts, kilowatts, and horsepower.

Angle Converter

Convert angles between degrees, radians, and gradians.

Frequency Unit Converter

Convert frequency between Hz, kHz, MHz, and GHz.

Cooking Measurement Unit Converter

Convert cooking measurements such as cups, tablespoons, teaspoons, and mL.

Force Unit Converter

Convert force between newtons, kilogram-force, and pound-force.

px pt mm Unit Converter

Convert values between pixels, points, and millimeters.

Mosaic Redaction

Upload an image and apply a full-image mosaic effect in your browser.

Location EXIF Remover

Redraw an image to canvas and download a new file without the original location and EXIF metadata.

KakaoTalk Photo Recovery

Inspect whether a KakaoTalk photo file can be opened and follow a checklist for finding the original or backup.

Photo EXIF Info Viewer

Check basic image file information, preview size, file type, and dimensions in your browser.

Image Info Checker

Check an image file name, file type, file size, and pixel dimensions.

Color Blindness Simulator

Preview an image through simple red, green, or blue color-vision simulation modes.

Personal Data Masking Tool

Mask personal data such as names, phone numbers, and email addresses in text.

Average Purchase Price Calculator

Calculate average purchase price from total cost and share count.

Stock Return Calculator

Calculate profit, loss, and return for a stock trade.

ROI Return on Investment Calculator

Calculate return on investment from cost and final value.

Compound Annual Growth Rate CAGR Calculator

Calculate compound annual growth rate from starting value, ending value, and years.

Stop-Loss and Target Price Calculator

Calculate stop-loss and target prices from an entry price.

Dividend Yield Calculator

Calculate dividend yield from share price and annual dividend.

Recurring Investment Calculator

Estimate future value from monthly recurring investments.

Target Average Price Calculator

Calculate how many additional shares are needed to reach a target average price.

Stock Average Down Calculator

Calculate a new average purchase price after buying more shares.

Stock Average Down Calculator 2

Calculate a new average price from an additional purchase budget.

Crypto Average Down Calculator

Calculate a new average price after buying more cryptocurrency.

Crypto Average Down Calculator 2

Calculate a new crypto average price from an additional budget.

Stock Return Calculator

Calculate profit, loss, and return for a stock trade.

Daily Stock Return Calculator

Calculate daily return from previous close and current price.

Stock Compound Interest Calculator

Estimate compound investment growth over time.

Crypto Return Calculator

Calculate profit, loss, and return for a crypto trade.

Daily Crypto Return Calculator

Calculate daily cryptocurrency return from previous close and current price.

Bitcoin Price Lookup

Open current market sources for a ticker or cryptocurrency keyword.

Global Stock Market Lookup

Open current global market index sources by keyword.

Futures Price Lookup

Open current futures market sources by keyword.

Net Salary Calculator

Estimate net salary after simplified deductions.

Real Estate Agent Fee Calculator

Estimate real estate brokerage fee from value and rate.

VAT Calculator

Calculate VAT and tax-included totals.

Installment Savings Interest Calculator

Estimate installment savings maturity value.

Car Acquisition Tax Calculator

Estimate car acquisition tax.

Rent Conversion Calculator

Convert deposit difference into monthly rent equivalent.

Simple Interest Calculator

Calculate simple interest from principal, rate, and years.

Fuel Cost Calculator

Estimate fuel cost from distance, efficiency, and fuel price.

Tip Calculator

Calculate total with tip.

Bill Split Calculator

Split a bill by number of people.

Unit Price Comparison

Compare two products by unit price.

Margin Rate Calculator

Calculate margin rate from cost and price.

Four Major Insurance Calculator

Estimate employee-side payroll insurance deductions from salary.

Minimum Wage Monthly Pay Calculator

Estimate monthly pay from hourly minimum wage.

Overtime Pay Calculator

Calculate overtime pay from wage, hours, and multiplier.

Real Estate Acquisition Tax Calculator

Estimate acquisition tax from property value and rate.

Gift Tax Calculator

Estimate simplified gift tax.

Deposit Interest Calculator

Estimate deposit maturity value from principal and rate.

Installment Fee Calculator

Estimate installment fee.

Comprehensive Income Tax Calculator

Estimate simplified comprehensive income tax.

DSR Calculator

Calculate debt service ratio from annual income and annual debt payments.

LTV Calculator

Calculate loan-to-value ratio from loan amount and collateral value.

Early Repayment Fee Calculator

Estimate early repayment fee.

Hourly Monthly Annual Pay Converter

Convert hourly wage into monthly and annual pay estimates.

Inheritance Tax Calculator

Estimate simplified inheritance tax from taxable amount and deduction.

Break-Even Point Calculator

Calculate break-even quantity from fixed cost and unit margin.

Stacked Discount Calculator

Apply two discounts in sequence.

Rental Yield Calculator

Calculate rental yield from price, deposit, and monthly rent.

Car Depreciation Calculator

Estimate annual vehicle depreciation.

Loan Repayment Method Comparison

Compare common loan repayment estimates.

Rule of 72 Calculator

Estimate how long it takes money to double using the Rule of 72.

Savings Goal Calculator

Estimate monthly saving needed to reach a target.

Subscription Total Calculator

Add monthly and annual subscription costs.

Salary to Hourly Wage Converter

Convert annual salary into an hourly wage estimate.

Present Value Calculator

Calculate present value from future value and discount rate.

Original Price Before Discount Calculator

Calculate original price before discount.

Tip Included Per Person Calculator

Calculate per-person total including tip and tax.

Simple vs Compound Interest Comparison

Compare simple interest and compound interest over time.

Margin and Markup Calculator

Calculate margin, markup, and profit.

Car Tax Calculator

Estimate car tax from engine size and rate.

Target Savings Deposit Calculator

Estimate monthly deposit needed for a target savings amount.

Installment Calculator

Estimate installment monthly payment.

Loan Interest Calculator

Estimate monthly loan payment and total interest.

Compound Interest Calculator

Calculate compound interest growth over time.

Discount Rate Calculator

Calculate discount rate from original and sale price.

Car Installment Calculator

Estimate car installment monthly payment.

Credit Card Installment Calculator

Estimate credit card installment monthly payment.

Lottery Tax Calculator

Estimate after-tax lottery prize amount.

Equal Principal and Interest Repayment Calculator

Estimate equal-payment loan monthly payment.

Equal Principal Repayment Calculator

Estimate equal-principal loan repayment values.

Exchange Rate Calculator

Convert an amount using an exchange rate.

World Exchange Rate Lookup

Open current exchange-rate sources by currency pair.

National Pension Real Value Calculator

Convert a future monthly pension benefit into current value using an annual inflation rate.

National Pension Claiming Age Calculator

Estimate the standard national pension claiming age and start year from birth year.

National Pension Expected Benefit Period Calculator

Estimate how long you may receive pension benefits from start age to expected lifespan.

National Pension Total Benefit Calculator

Estimate lifetime nominal pension benefits from monthly amount and benefit period.

National Pension Early Claiming Break-Even Calculator

Compare early and normal claiming to estimate the cumulative break-even age.

National Pension Delayed Claiming Break-Even Calculator

Compare normal and delayed claiming to estimate the break-even age.

National Pension Couple Combined Calculator

Combine two monthly pension benefits and compare their current-value feel with inflation.

National Pension Income Gap Calculator

Calculate the monthly gap between target living cost and pension plus other income.

National Pension Replacement Savings Calculator

Estimate the monthly savings needed before retirement to cover a pension income shortfall.

National Pension Contribution Payback Period Calculator

Estimate how many years of monthly pension benefits it takes to recover total contributions paid.

D-Day Calculator

Calculate D-day from today to a target date.

BMI Calculator

Calculate BMI from height and weight.

Date Add and Subtract Calculator

Add or subtract days from a base date.

Due Date Calculator

Estimate a pregnancy due date from the last period start date.

Countdown Timer

Count down to a target date and time.

Day of Week Finder

Find the day of week for a selected date.

Leap Year Checker

Check whether a year is a leap year.

Annual Leave Days Calculator

Estimate annual leave days from a hire date.

Date Difference Calculator

Calculate the number of days between two dates.

School Grade Calculator

Estimate school grade from birth year.

Korean Zodiac Calculator

Find the Korean zodiac animal for a birth year.

Grade Conversion Calculator

Convert a GPA score to a 4.0 scale.

Age Difference Calculator

Calculate the age difference between two birth dates.

Week Number Calculator

Find the ISO week number for a date.

12/24 Hour Time Converter

Convert between 12-hour and 24-hour time formats.

Weekday Count Counter

Count how many selected weekdays occur between two dates.

Quarter Calculator

Find the quarter, start date, and end date for a date.

Time Lived Calculator

Calculate lived days, hours, and minutes from a birth date.

Work Hours Calculator

Calculate net work hours from start time, end time, and break minutes.

Percentage Calculator

Calculate percent share and simple increase or decrease values.

Ratio Calculator

Simplify a ratio and show its decimal value.

Average Calculator

Calculate average and standard deviation from a number list.

Standard Deviation Calculator

Calculate average and standard deviation from a number list.

GCD and LCM

Calculate greatest common divisor and least common multiple.

Prime Number Checker

Check whether a number is prime.

Factorial Calculator

Calculate factorial for a non-negative integer.

Power and Square Root

Calculate powers and roots from a base and exponent.

Fraction Calculator

Add, subtract, multiply, or divide fractions and show the decimal result.

Triangle Area Calculator

Calculate triangle area from base and height.

Circle Area and Circumference Calculator

Calculate circle area and circumference from radius.

Quadratic Equation Calculator

Solve a quadratic equation and show the discriminant.

Permutation and Combination Calculator

Calculate permutations and combinations.

Round Ceiling Floor

Round, floor, and ceil a number to selected decimal places.

Aspect Ratio Calculator

Calculate scaled height from an aspect ratio.

PPI Calculator

Calculate screen pixel density from resolution and diagonal size.

Screen Size Calculator

Estimate screen width and height from diagonal size and ratio.

Sequence Sum Calculator

Calculate the sum of an arithmetic series.

Log and Exponent Calculator

Calculate logarithms and exponential reference values.

Median and Mode Calculator

Calculate median and mode from a number list.

Percentile Calculator

Calculate a percentile from a list of numbers.

Ratio Distribution Calculator

Split a total value by ratio parts.

Target Average Score Calculator

Find the next score needed to reach a target average.

Proportion Calculator

Solve a proportion in the form A:B = C:x.

Probability Calculator

Calculate single-trial and repeated-trial probability.

Basic Calculator

Evaluate a basic arithmetic expression in the browser.

Fibonacci Sequence Generator

Generate Fibonacci sequence terms.

Trigonometry Calculator

Calculate sine, cosine, and tangent from an angle in degrees.

Equation Calculator

Solve a simple linear equation in the form ax + b = 0.

Bitwise Operation Calculator

Run common bitwise operations on two integers.

2x2 Matrix Calculator

Calculate determinant, trace, and inverse availability for a 2x2 matrix.

2D Vector Calculator

Calculate vector addition, subtraction, dot product, and magnitude for two 2D vectors.

Win Rate Calculator

Calculate win rate from wins and losses.

Solid Volume Calculator

Calculate volume for a box, sphere, or cylinder.

Pythagorean Theorem Calculator

Calculate a hypotenuse using the Pythagorean theorem.

Half-Life Calculator

Calculate remaining amount after elapsed half-life periods.

Solution Dilution Calculator

Calculate final volume and diluent amount for a dilution target.

Ohm's Law Calculator

Calculate resistance and power using Ohm law values.

Number Sequence Generator

Generate an arithmetic number sequence.

All-in-One Percent Calculator

Calculate common percentage values from a base number.

Korean Large Number Unit Converter

Convert a number into Korean large-number unit references.

Weighted Average Calculator

Calculate a weighted average from value and weight pairs.

Ratio Simplifier

Simplify two numbers into the smallest ratio.

Golden Ratio Calculator

Calculate golden-ratio related values from a base number.

Weekly Holiday Allowance Calculator

Estimate weekly holiday allowance from hourly pay and weekly hours.

Quit Smoking Savings Calculator

Estimate cigarettes avoided and money saved after quitting smoking.

Days Lived Calculator

Calculate how many days, weeks, and years you have lived.

Workday Count Calculator

Count weekdays between two dates while excluding Saturday and Sunday.

Hourly to Monthly Pay Converter

Convert hourly pay and monthly hours into estimated monthly and annual pay.

GPA Calculator

Calculate GPA from credits and letter grades.

Birthday D-Day Calculator

Find the D-day count until the next birthday.

Retirement Date Calculator

Estimate a retirement date from birth date and retirement age.

Dog Age Calculator

Convert a dog age into an approximate human-age estimate.

Cat Age Calculator

Convert a cat age into an approximate human-age estimate.

Wi-Fi QR Code Generator

Create a Wi-Fi QR payload and preview code from network details.

Baby 100-Day and First Birthday Calculator

Calculate a baby's 100th day and first birthday dates.

Longevity Anniversary Calculator

Calculate milestone birthday dates such as 60, 70, 80, and 100.

Digital Signature Maker

Create simple digital signature text variants from a name.

Wedding Anniversary Calculator

Check elapsed days and upcoming 100-day milestone dates from a wedding date.

100-Day Anniversary Calculator

Calculate 100-day milestones and anniversary dates from a relationship start date.

Year Progress Calculator

Check how much of the current year has passed.

Korean Zodiac Age Chart

View a Korean zodiac animal chart around a selected year.

Recipe Serving Adjuster

Scale ingredient amounts from original servings to target servings.

Tile and Flooring Calculator

Estimate how many tiles or flooring pieces are needed for a room.

Paint Amount Calculator

Estimate paint liters needed from wall area and coverage.

Event Countdown

Count down to an event date and time.

Lunch Menu Recommender

Randomly pick a lunch menu from your options.

Unknown Phone Number Search Tool

Normalize an unknown phone number and prepare a quick lookup query.

Lottery Number Generator

Use this lottery number generator to pick, generate, decide, or play directly in your browser.

Random Number Draw

Use this random number draw to pick, generate, decide, or play directly in your browser.

Dice and Coin Toss

Use this dice and coin toss to pick, generate, decide, or play directly in your browser.

Wheel Roulette

Use this wheel roulette to pick, generate, decide, or play directly in your browser.

Random Name Picker

Use this random name picker to pick, generate, decide, or play directly in your browser.

Zodiac and Horoscope Finder

Use this zodiac and horoscope finder to pick, generate, decide, or play directly in your browser.

Stopwatch Timer

Use this stopwatch timer to pick, generate, decide, or play directly in your browser.

Random Nickname Generator

Use this random nickname generator to pick, generate, decide, or play directly in your browser.

Random Name Generator

Use this random name generator to pick, generate, decide, or play directly in your browser.

Team Maker Group Splitter

Use this team maker group splitter to pick, generate, decide, or play directly in your browser.

Random Quote

Use this random quote to pick, generate, decide, or play directly in your browser.

Pomodoro Timer

Use this pomodoro timer to pick, generate, decide, or play directly in your browser.

What to Eat Today

Use this what to eat today to pick, generate, decide, or play directly in your browser.

Would You Rather Game

Use this would you rather game to pick, generate, decide, or play directly in your browser.

Coin Flip

Use this coin flip to pick, generate, decide, or play directly in your browser.

Yes or No Decider

Use this yes or no decider to pick, generate, decide, or play directly in your browser.

Random Date Generator

Use this random date generator to pick, generate, decide, or play directly in your browser.

Name Compatibility Test

Use this name compatibility test to pick, generate, decide, or play directly in your browser.

Tap Counter

Use this tap counter to pick, generate, decide, or play directly in your browser.

Rock Paper Scissors Game

Use this rock paper scissors game to pick, generate, decide, or play directly in your browser.

Number Baseball Game

Use this number baseball game to pick, generate, decide, or play directly in your browser.

Random English Word

Use this random english word to pick, generate, decide, or play directly in your browser.

Random Letters and Numbers

Use this random letters and numbers to pick, generate, decide, or play directly in your browser.

MBTI Type Guide

Use this mbti type guide to pick, generate, decide, or play directly in your browser.

Lucky Number from Name

Use this lucky number from name to pick, generate, decide, or play directly in your browser.

Child Blood Type Probability

Use this child blood type probability to pick, generate, decide, or play directly in your browser.

Slot Machine Game

Use this slot machine game to pick, generate, decide, or play directly in your browser.

Penalty Roulette

Use this penalty roulette to pick, generate, decide, or play directly in your browser.

Random Mission Picker

Use this random mission picker to pick, generate, decide, or play directly in your browser.

Store Name Generator

Use this store name generator to pick, generate, decide, or play directly in your browser.

Random Gacha Draw

Use this random gacha draw to pick, generate, decide, or play directly in your browser.

Random Stat Generator

Use this random stat generator to pick, generate, decide, or play directly in your browser.

Fantasy Name Generator

Use this fantasy name generator to pick, generate, decide, or play directly in your browser.

Find My Animal Finder

Use this find my animal finder to pick, generate, decide, or play directly in your browser.

Horoscope Compatibility

Use this horoscope compatibility to pick, generate, decide, or play directly in your browser.

Name Stroke Reading

Use this name stroke reading to pick, generate, decide, or play directly in your browser.

Travel Destination Roulette

Use this travel destination roulette to pick, generate, decide, or play directly in your browser.

Cocktail Recommender

Use this cocktail recommender to pick, generate, decide, or play directly in your browser.

Tap BPM Tempo Counter

Use this tap bpm tempo counter to pick, generate, decide, or play directly in your browser.

Seating Arrangement Picker

Use this seating arrangement picker to pick, generate, decide, or play directly in your browser.

Random Line Picker

Use this random line picker to pick, generate, decide, or play directly in your browser.

Writing Prompt Recommender

Use this writing prompt recommender to pick, generate, decide, or play directly in your browser.

Drawing Prompt Recommender

Use this drawing prompt recommender to pick, generate, decide, or play directly in your browser.

Question of the Day

Use this question of the day to pick, generate, decide, or play directly in your browser.

Lucky Color of the Day

Use this lucky color of the day to pick, generate, decide, or play directly in your browser.

Truth or Dare

Use this truth or dare to pick, generate, decide, or play directly in your browser.

Bingo Board Generator

Use this bingo board generator to pick, generate, decide, or play directly in your browser.

Anagram Text Shuffler

Use this anagram text shuffler to pick, generate, decide, or play directly in your browser.

Birth Flower Finder

Use this birth flower finder to pick, generate, decide, or play directly in your browser.

Birthstone Finder

Use this birthstone finder to pick, generate, decide, or play directly in your browser.

Random MBTI Picker

Use this random mbti picker to pick, generate, decide, or play directly in your browser.

Dinosaur Encyclopedia Search Tool

Use this dinosaur encyclopedia search tool to pick, generate, decide, or play directly in your browser.

Random Number Generator

Use this random number generator to pick, generate, decide, or play directly in your browser.

Random Word Picker

Use this random word picker to pick, generate, decide, or play directly in your browser.

Random Text Generator

Use this random text generator to pick, generate, decide, or play directly in your browser.

Alien Text Generator

Use this alien text generator to pick, generate, decide, or play directly in your browser.

Gradient Generator

Generate a linear gradient CSS background.

Box Shadow Generator

Generate box-shadow CSS.

Color Palette

Generate a color palette from a base color.

Contrast Checker

Check color contrast ratio.

Random Color Generator

Generate a random color.

Color Mixer

Mix two colors.

WCAG Contrast Checker

Check color contrast ratio.

CSS Border Radius Generator

Generate CSS border-radius values with a preview.

CSS Text Shadow Generator

Generate CSS text shadow.

Gradient Text Generator

Generate gradient text CSS.

Color Shade Palette

Generate color shades and tints.

Complementary Color Palette

Generate a complementary color.

Glassmorphism CSS Generator

Generate glassmorphism CSS.

CSS Triangle Generator

Generate a CSS triangle.

CSS Loading Spinner Generator

Generate a CSS loading spinner snippet.

CSS Easing Curve Generator

Generate a CSS easing curve value.

Color Name Finder

Show basic color name and RGB reference.

Neumorphism CSS Generator

Generate neumorphism CSS.

CSS Button Generator

Generate button CSS from colors and size.

Text Favicon Generator

Generate a simple text favicon SVG.

Placeholder Image Generator

Generate a placeholder SVG image.

CSS Border Generator

Generate border CSS.

CSS Grid Generator

Generate a simple CSS grid layout snippet.

CSS Background Pattern Generator

Generate a simple CSS background pattern.

SVG Wave Divider Generator

Generate an SVG wave divider.

RGB CMYK Converter

Convert RGB color to CMYK reference values.

Mesh Gradient Generator

Generate a mesh gradient CSS background.

CSS Flexbox Generator

Generate flexbox alignment CSS.

CSS Card Generator

Generate a simple card CSS snippet.

CSS Aspect Ratio Box Generator

Generate an aspect-ratio box CSS snippet.

CSS Color Name Chart

View a color value and basic RGB information.

Material Color Palette

Generate a material-style color palette.

CSS Text Outline

Generate CSS text outline.

CSS Speech Bubble Generator

Generate a CSS speech bubble snippet.

Gradient Border

Generate a gradient border CSS snippet.

CSS Scrollbar Generator

Generate custom scrollbar CSS.

Initial Avatar Generator

Generate an initial avatar SVG.

Daily Water Intake

Estimate daily water intake from body weight using a simple 35 ml per kg reference.

Sleep Time Calculator

Calculate suggested bedtimes from a wake-up time using 90-minute sleep cycles.

Running Pace Calculator

Calculate pace per kilometer and average speed from distance and finish time.

One-Rep Max Calculator

Estimate your one-rep max from lifted weight and repetitions.

Blood Alcohol Content BAC

Estimate blood alcohol content from body weight, alcohol amount, sex, and elapsed time.

Caffeine Intake Calculator

Calculate caffeine intake per kilogram of body weight and show a simple reference level.

Exercise Heart Rate Calculator

Estimate maximum heart rate and basic exercise heart-rate zones from age.

Pregnancy Weeks Calculator

Estimate pregnancy weeks, days, and due date from the last period start date.

Marathon Time Predictor

Predict a race time for another distance using a known race result.

Blood Pressure Classification Calculator

Classify a blood pressure reading from systolic and diastolic values.

Blood Sugar Classification Calculator

Classify a blood glucose reading as normal, elevated, or high by measurement state.

Interval Timer Tabata

Calculate total interval workout time from work seconds, rest seconds, and rounds.

Workout of the Day Recommender

Pick a simple workout idea by intensity level.

Smoking Pack-Year Calculator

Calculate smoking pack-years from packs per day and years smoked.

Nap Time Recommender

Find short nap and full sleep-cycle nap end times from the current time.

Ovulation Calculator

Estimate ovulation day, fertile window, and next period date from cycle length.

Basal Metabolic Rate BMR

Estimate basal metabolic rate from sex, age, height, and weight.

Body Fat Percentage Estimator

Estimate body fat percentage using circumference measurements.

Exercise Calorie Burn

Estimate calories burned for common exercises using MET values.

Standard Weight Calculator

Estimate standard body weight from height and sex.

Protein Intake Calculator

Estimate daily protein intake from body weight and fitness goal.

Daily Calorie Needs TDEE

Estimate total daily energy expenditure from BMR and activity level.

Waist-to-Hip Ratio WHR Calculator

Calculate waist-to-hip ratio from waist and hip measurements.

Diet Goal Calculator

Calculate the calorie gap for a target weight change over a chosen number of days.

Step Calorie Calculator

Estimate calories burned and distance from step count and body weight.

Alcohol Calorie Calculator

Estimate pure alcohol grams and calories from drink volume, ABV, and servings.

Exercise Time for Calories

Estimate how many minutes of exercise are needed to burn a target number of calories.

Intermittent Fasting Calculator

Calculate fasting and eating windows for plans such as 16:8, 18:6, and 20:4.

Macro Nutrient Calculator

Calculate protein, fat, and carbohydrate grams from calorie and macro percentage targets.

Diet Calculator

Estimate the daily calorie gap needed to move from current weight to target weight.

Exercise Calorie Calculator

Estimate calories burned from exercise type, body weight, and workout time.

Food Calorie Calculator

Add food names and calorie values to calculate a simple meal total.

Basal Metabolic Rate Calculator

Estimate daily basal metabolic rate using the Mifflin-St Jeor formula.

Ideal Weight Calculator

Estimate a simple reference weight from height and compare it with current weight.

Dice Roller Tool

Roll one or more dice and calculate the total.

Ladder Game Game

Randomly match participants with results like a ladder game.

Random Draw Tool

Pick one or more random items from a list.

Two-Character Nickname Generator

Generate short two-part nicknames.

English Name Generator

Generate random English-style names.

Password Generator

Generate a random password with optional symbols.

Special Character Emoticons Collection

Browse, search, and copy text emoticons and decorative symbols.

Unicode Symbols Collection

Browse, search, and copy common Unicode symbols.

Percent Calculator

Calculate percentages, percentage share, percentage change, and increased or decreased values.

Fahrenheit Celsius Converter

Convert temperatures between Fahrenheit and Celsius.

Gold Weight Calculator

Convert Korean don units of gold into grams and estimate price per gram or per don.

Gold Weight Converter

Convert gold weight in grams into Korean don units and estimate price per gram or per don.

Pyeong Area Calculator

Convert between pyeong and square meters for area calculations.

Korean Age Calculator

Calculate international age, Korean age, and months lived from a birthday.

Life Expectancy Calculator

Estimate life expectancy from age, lifestyle, family history, activity, sleep, smoking, and body information.

Military Discharge Date Calculator

Calculate an estimated Korean military discharge date from enlistment date and service type.

Predicted Height Calculator

Estimate a child's adult height from the parents' heights.

Height from Foot Size Calculator

Estimate possible adult height from parents' height, foot size, sleep, and exercise.

Annual Leave Calculator

Estimate annual leave days from an employment start date under Korean leave rules.

Annual Leave Pay Calculator

Estimate annual leave allowance from monthly pay and unused leave days.

Solar to Lunar Calendar Converter

Convert a solar calendar date to a Korean lunar calendar date.

Lunar to Solar Calendar Converter

Convert a Korean lunar calendar date to a solar calendar date.

QR Code Generator

Create a QR code image from a URL or text string.

World Time Lookup Tool

Check the current time in major cities and time zones.

My IP Address Checker

Check the IP address detected by this website.

Life Clock Calculator

Estimate the percentage of life lived and remaining years from a birth date and lifespan reference.

Country Calling Code Search Tool

Search common international calling codes by code or country name.

JavaScript Minifier

Minify JavaScript by removing comments and compacting common whitespace.

CSS Minifier

Minify CSS by removing comments, extra spaces, and unnecessary line breaks.

HTML Minifier

Minify HTML by removing comments, whitespace, and line breaks between tags.

HTML Tag Remover Tool

Remove HTML tags from pasted markup and keep only readable plain text.

Sunrise and Sunset Time Lookup

Look up approximate sunrise and sunset times from latitude, longitude, and date.