All Free Online Tools

Percentage Calculator

Find a percentage of a number, or what percentage one number is of another.

Percentage Increase Calculator

Work out the percentage increase between two values.

Percentage Decrease Calculator

Work out the percentage decrease between two values.

Discount Calculator

Work out the sale price after a percentage discount.

Tip Calculator

Work out the tip and total bill, and split it between people.

Age Calculator

Find your exact age in years, months, and days from your birth date.

BMI Calculator

Calculate your Body Mass Index from your height and weight.

Loan Calculator

Estimate your monthly loan payment from the amount, rate, and term.

Compound Interest Calculator

See how an investment grows over time with compound interest.

BMR Calculator

Estimate your Basal Metabolic Rate — the calories your body burns at rest.

Mortgage Calculator

Estimate your monthly mortgage payment from home price, down payment, rate, and term.

Simple Interest Calculator

Calculate interest earned or owed using the simple interest formula.

VAT Calculator

Add or remove VAT from a price at any rate.

Sales Tax Calculator

Add or remove sales tax from a price at any rate.

Average Calculator

Find the mean, median, min, and max of a list of numbers.

Ratio Calculator

Simplify a ratio, or solve for a missing value in a proportion.

Fraction Calculator

Add, subtract, multiply, or divide two fractions and simplify the result.

GPA Calculator

Calculate your Grade Point Average from letter grades and credit hours.

Date Difference Calculator

Find the exact time between two dates in years, months, and days.

Fuel Cost Calculator

Estimate the fuel cost of a trip from distance, consumption, and fuel price.

Salary Calculator

Convert between hourly rate and annual salary.

Calcul de l'impôt sur le revenu

Estimez votre impôt sur le revenu à partir du barème progressif 2024 et du quotient familial.

Calcul indemnité de licenciement

Calculez l'indemnité légale minimale de licenciement selon votre salaire et votre ancienneté.

Calcul bulletin de paie (brut en net)

Convertissez un salaire brut en net avec le détail de chaque cotisation salariale.

Square Root Calculator

Find the square root of any non-negative number.

Cube Root Calculator

Find the cube root of any number, including negatives.

GCD Calculator

Find the greatest common divisor of two numbers.

LCM Calculator

Find the least common multiple of two numbers.

Prime Number Checker

Check if a number is prime, and see its prime factors if not.

Leap Year Checker

Check whether a year is a leap year.

Days in Month Calculator

Find how many days are in any month of any year.

Unix Timestamp Converter

Convert between a Unix timestamp and a human-readable date.

Countdown Calculator

See a live countdown to any future date and time.

Word Counter

Count words, characters, sentences, and paragraphs as you type.

Character Counter

Count characters with and without spaces, useful for limits like tweets or meta descriptions.

Case Converter

Convert text to uppercase, lowercase, title case, or sentence case.

Remove Duplicate Lines

Delete repeated lines from a block of text, keeping the first occurrence.

Sentence Counter

Count the number of sentences and words in your text.

Whitespace Remover

Remove extra spaces and collapse excess blank lines from text.

Find and Replace

Find and replace text, with an optional case-sensitive match.

Text Difference Checker

Compare two blocks of text and see exactly what changed, line by line.

JSON Formatter

Format, validate, and beautify JSON with proper indentation.

Base64 Encoder / Decoder

Encode text to Base64, or decode Base64 back to plain text.

URL Encoder / Decoder

Encode text for safe use in a URL, or decode a URL-encoded string.

UUID Generator

Generate random, version-4 UUIDs for use in code or databases.

Hash Generator

Generate a SHA-1, SHA-256, or SHA-512 hash of any text.

HTML Encoder / Decoder

Encode text to HTML entities, or decode HTML entities back to plain text.

Color Converter

Convert between HEX and RGB color formats.

Regex Tester

Test a regular expression against sample text and see all matches.

Meta Title Generator

Check the pixel and character length of a page title against Google's typical cutoff.

Meta Description Generator

Check the character length of a meta description against Google's typical cutoff.

Slug Generator

Turn a title into a clean, URL-safe slug.

Keyword Density Checker

Check how often each word appears in your text, as a percentage.

UTM Builder

Build a campaign-tagged URL with UTM parameters for analytics tracking.

URL Parser

Break a URL down into its protocol, host, path, and query parameters.

Canonical URL Generator

Strip tracking parameters and normalize a URL to a clean canonical form.

HTTP Status Code Lookup

Look up what any HTTP status code means, from 100 to 504.

Length Converter

Convert between meters, feet, inches, miles, and more.

Weight Converter

Convert between kilograms, pounds, ounces, stone, and more.

Temperature Converter

Convert between Celsius, Fahrenheit, and Kelvin.

Area Converter

Convert between square meters, acres, hectares, square feet, and more.

Volume Converter

Convert between liters, gallons, cups, milliliters, and more.

Speed Converter

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

Time Converter

Convert between seconds, minutes, hours, days, and more.

Data Storage Converter

Convert between bytes, kilobytes, megabytes, gigabytes, and more.

Energy Converter

Convert between joules, calories, kilowatt-hours, and BTU.

Pressure Converter

Convert between pascals, bar, PSI, atmospheres, and mmHg.

Power Converter

Convert between watts, kilowatts, and horsepower.

Frequency Converter

Convert between hertz, kilohertz, megahertz, and RPM.

JPG to PNG Converter

Convert a JPG image to PNG format, entirely in your browser.

PNG to JPG Converter

Convert a PNG image to JPG format, entirely in your browser.

JPG to WebP Converter

Convert a JPG image to the smaller, modern WebP format.

PNG to WebP Converter

Convert a PNG image to the smaller, modern WebP format.

WebP to JPG Converter

Convert a WebP image to the widely-supported JPG format.

WebP to PNG Converter

Convert a WebP image to the widely-supported PNG format.

Image Resizer

Resize an image to exact pixel dimensions, entirely in your browser.

Image Compressor

Reduce an image's file size with an adjustable quality slider.

Image to Base64 Converter

Convert an image to a Base64 data URI you can embed directly in HTML or CSS.

Base64 to Image Converter

Convert a Base64 string back into a downloadable image.

Image Dimensions Checker

Check an image's exact width, height, aspect ratio, and file size.

Favicon Generator

Generate all the standard favicon sizes from a single image.

Merge PDF

Combine multiple PDF files into one, entirely in your browser.

Split PDF

Extract specific pages from a PDF into a new file.

PDF Page Rotator

Rotate all or specific pages of a PDF by 90, 180, or 270 degrees.

PDF Page Deleter

Remove specific pages from a PDF.

JPG to PDF

Convert JPG images into a PDF, one image per page.

PNG to PDF

Convert PNG images into a PDF, one image per page.

PDF Metadata Viewer

View a PDF's title, author, subject, and other document properties.