All Tools

89 free tools across 7 categories

Math & Science 15

Area Calculator

Calculate the area and perimeter of circles, rectangles, triangles, trapezoids, and ellipses

Volume Calculator

Calculate the volume and surface area of spheres, cubes, cylinders, cones, and rectangular prisms

Pythagorean Theorem Calculator

Find the missing side of a right triangle using the Pythagorean theorem (a^2 + b^2 = c^2)

Percentage Calculator

Calculate percentages: find X% of Y, percent change, percent difference, and what percent X is of Y

BMI Calculator

Calculate your Body Mass Index (BMI) using metric or imperial units and see your weight category

Quadratic Equation Solver

Solve quadratic equations (ax^2 + bx + c = 0) and find roots, discriminant, and vertex

Fraction Calculator

Add, subtract, multiply, and divide fractions with step-by-step simplification

Standard Deviation Calculator

Calculate standard deviation, variance, mean, median, and mode from a set of numbers

Mean, Median, Mode Calculator

Calculate the mean, median, mode, range, sum, and count from a dataset

Ohm's Law Calculator

Calculate voltage, current, resistance, and power using Ohm's law (V = I * R)

Speed, Distance & Time Calculator

Calculate speed, distance, or time from any two known values using the formula d = s * t

Compound Interest Calculator

Calculate compound interest, final amount, and effective annual rate for investments and savings

Scientific Notation Converter

Convert numbers to and from scientific notation, engineering notation, and E-notation

Matrix Calculator

Calculate determinant, inverse, transpose, and matrix multiplication for 2x2 and 3x3 matrices

Probability Calculator

Calculate probability, odds, complement, combinations, and permutations

Unit Converters 15

Length Converter

Convert between kilometers, miles, meters, feet, inches, centimeters and more length units

Weight Converter

Convert between kilograms, pounds, ounces, grams, stones and more weight units

Temperature Converter

Convert between Celsius, Fahrenheit and Kelvin temperature scales

Speed Converter

Convert between kilometers per hour, miles per hour, meters per second, knots and more

Area Converter

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

Volume Converter

Convert between liters, gallons, milliliters, cups, fluid ounces and more volume units

Time Converter

Convert between seconds, minutes, hours, days, weeks, months and years

Digital Storage Converter

Convert between bytes, kilobytes, megabytes, gigabytes, terabytes and petabytes

Pressure Converter

Convert between Pascal, bar, PSI, atmospheres, mmHg and kilopascals

Energy Converter

Convert between joules, calories, kilocalories, kilowatt-hours, BTU and electronvolts

Frequency Converter

Convert between Hertz, kilohertz, megahertz, gigahertz and RPM

Angle Converter

Convert between degrees, radians, gradians, turns, arcminutes and arcseconds

Fuel Economy Converter

Convert between km/L, L/100km, MPG (US) and MPG (UK) fuel economy units

Power Converter

Convert between watts, kilowatts, megawatts, horsepower and BTU per hour

Number System Converter

Convert between decimal, binary, hexadecimal and octal number systems

Developer Tools 15

JSON Formatter & Beautifier

Format, beautify, and validate JSON data online. Paste your JSON and get perfectly indented, readable output instantly.

Base64 Encoder / Decoder

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

URL Encoder / Decoder

Encode special characters for URLs or decode percent-encoded strings. Essential for building safe URLs.

JWT Decoder

Decode JSON Web Tokens (JWT) to inspect the header, payload, and signature. No server-side processing.

Hash Generator (MD5, SHA-1, SHA-256, SHA-512)

Generate cryptographic hashes from text input. Supports MD5, SHA-1, SHA-256, and SHA-512 algorithms.

Regex Tester

Test regular expressions against sample text in real time. See matches, groups, and capture results instantly.

UUID Generator

Generate random UUIDs (v4) or time-based UUIDs (v1). Create multiple UUIDs at once for batch operations.

Unix Timestamp Converter

Convert between Unix timestamps and human-readable dates. Supports seconds and milliseconds.

HTML Entity Encoder / Decoder

Encode special characters to HTML entities or decode entities back to characters. Prevent XSS and display issues.

Lorem Ipsum Generator

Generate placeholder text for design mockups and layouts. Choose words, sentences, or paragraphs.

Cron Expression Parser

Parse cron expressions into human-readable descriptions and see the next scheduled run times.

Markdown to HTML Converter

Convert Markdown text to HTML with live preview. Supports headings, lists, links, images, code blocks, and more.

Color Converter

Convert any color format to HEX, RGB, and HSL. Enter a color in any supported format and get all representations.

Text Diff Tool

Compare two texts and see the differences highlighted line by line. Find additions, deletions, and unchanged lines.

YAML / JSON Converter

Convert between YAML and JSON formats. Supports nested objects, arrays, and common YAML features.

Text Tools 12

Word Counter

Count words, characters, sentences, paragraphs, and estimate reading time for any text.

Character Counter

Get detailed character statistics: total characters, letters, digits, spaces, and punctuation counts.

Text Case Converter

Convert text between UPPER, lower, Title Case, camelCase, snake_case, kebab-case, PascalCase, and CONSTANT_CASE.

Text Reverser

Reverse any text character by character. Useful for creating mirror text or solving puzzles.

Duplicate Line Remover

Remove duplicate lines from text while preserving the order of first occurrences.

Sort Lines

Sort text lines alphabetically (A-Z, Z-A), by length, or randomize their order.

Find and Replace

Find and replace text with optional regex support and case sensitivity control. See how many replacements were made.

String Length Calculator

Calculate string length in characters, bytes (UTF-8), and UTF-16 code units.

Text to URL Slug

Convert any text into a clean, URL-friendly slug. Handles accented characters and special symbols.

ROT13 Encoder / Decoder

Apply ROT13 cipher to text. Each letter is shifted 13 positions in the alphabet. Applying twice returns the original.

Whitespace Normalizer

Clean up whitespace: trim lines, collapse multiple spaces, and remove blank lines.

Email Address Extractor

Extract all email addresses from any text. Finds unique emails using pattern matching.

Color Tools 12

HEX to RGB Converter

Convert HEX color codes to RGB values. Enter a hexadecimal color and get the red, green, and blue components.

RGB to HEX Converter

Convert RGB color values to HEX code. Enter red, green, and blue values (0-255) to get the hexadecimal color code.

HSL Color Converter

Convert colors between HEX, RGB, and HSL formats. Pick a color and see all representations.

Color Palette Generator

Generate harmonious color palettes from a base color. Supports complementary, triadic, analogous, and more.

Color Contrast Checker (WCAG)

Check color contrast ratios for WCAG 2.0 AA and AAA accessibility compliance. Test foreground and background color combinations.

Color Blindness Simulator

See how colors appear to people with different types of color blindness: protanopia, deuteranopia, and tritanopia.

CSS Gradient Generator

Create beautiful CSS gradients with a color picker. Adjust colors, angle, and type with live preview.

Shades and Tints Generator

Generate shades (darker) and tints (lighter) of any color. Perfect for creating consistent color scales.

Random Color Generator

Generate random colors in different styles: any, pastel, dark, or vibrant. Get HEX, RGB, and HSL values.

CSS Named Colors

Search and browse all 148 CSS named colors. Find colors by name and see their HEX values.

Image Color Extractor

Extract the dominant color palette from any image. Upload a photo and get the most prominent colors.

Complementary Color Finder

Find the complementary and split-complementary colors for any input color on the color wheel.

Image Tools 10

Image Compressor

Compress images in your browser without uploading. Adjust quality to balance file size and visual quality.

Image Resizer

Resize images to specific dimensions. Optionally maintain the aspect ratio for proportional scaling.

Image Cropper

Crop images by specifying exact coordinates and dimensions. Cut out any rectangular region.

PNG to JPG Converter

Convert PNG images to JPG format. Reduce file size by switching from lossless to lossy compression.

JPG to PNG Converter

Convert JPG images to PNG format. Get lossless quality and transparency support.

Image to WebP Converter

Convert images to WebP format for better compression. WebP provides 25-34% smaller files than JPG and PNG.

Image to Base64

Convert any image to a Base64-encoded string. Get both the raw Base64 and a complete data URI.

SVG to PNG Converter

Convert SVG vector graphics to PNG raster images. Supports scaling for high-resolution output.