Free Online Tools

172 free tools, right in your browser. No signup, no limits.

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Encoders & Decoders(10)

Base64 Encoder & Decoder

Encode and decode Base64 strings online for free. Supports UTF-8.

CSS Minifier

Minify CSS by removing comments, whitespace and unnecessary characters.

Hex Encoder & Decoder

Free online hexadecimal encoder and decoder. Convert text to hex strings and decode hex back to readable text.

HTML Entities Encoder & Decoder

Encode and decode HTML entities online for free. Convert special characters like <, >, & and quotes.

HTML Minifier

Minify HTML by removing comments, whitespace and unnecessary line breaks.

JavaScript Minifier

Minify JavaScript by removing comments and unnecessary whitespace.

JWT Decoder

Decode JWT tokens online for free. View header, payload and signature.

Punycode/IDN Converter

Free online Punycode converter. Encode and decode internationalized domain names (IDN) to and from Punycode.

Unicode Escape Converter

Free online Unicode escape converter. Convert text to and from Unicode escape sequences (\u0041) instantly.

URL Encoder & Decoder

Encode and decode URLs online for free. Convert special characters to URL-safe format.

Code Formatters(12)

CSS Formatter & Minifier

Format and minify CSS online for free. Beautify your CSS code with automatic indentation.

GraphQL Formatter

Format and indent GraphQL queries online.

HTML Formatter & Minifier

Format and minify HTML online for free. Automatic tag and attribute indentation.

JavaScript Formatter & Minifier

Free online JavaScript formatter and minifier. Beautify or compress JS code with automatic indentation.

JSON Formatter & Validator

Format, validate and minify JSON online for free. Paste your JSON and get a readable version instantly.

Markdown Preview & Editor

Free online Markdown editor with live preview. Write Markdown and see it rendered in real time. Export as HTML.

PHP Formatter

Format and indent PHP code online.

Python Formatter

Format and normalize Python code indentation.

SQL Formatter & Beautifier

Format and beautify SQL queries online for free. Automatic indentation and uppercase keywords.

TypeScript Formatter

Format and indent TypeScript code online.

XML Formatter & Minifier

Format and minify XML online for free. Automatic indentation and readable display.

YAML Formatter & Validator

Free online YAML formatter and validator. Beautify YAML files with proper indentation and syntax validation.

Generators(21)

Color Palette Generator

Generate color palettes online for free. Complementary, analogous and triadic schemes.

Cron Expression Generator

Build cron expressions visually and see next execution times.

Dockerfile Generator

Generate a custom Dockerfile for your application.

Emoji Picker & Search

Free online emoji picker. Search and copy emojis organized by category. Click any emoji to copy it to clipboard.

.env Generator

Generate a .env file with environment variables.

Fake Data Generator

Generate fake names, emails, phone numbers, addresses, and UUIDs.

.gitignore Generator

Generate a .gitignore file by selecting languages and environments.

Hash ID Generator

Generate nanoid-style short IDs online for free. Configurable length and alphabet.

License Generator

Generate open-source license files (MIT, Apache, GPL and more).

Lorem Ipsum Generator

Generate Lorem Ipsum text online for free. Paragraphs, sentences or words with configurable count.

Meta Tag Generator

Generate HTML meta tags for SEO with title, description and keywords.

Nginx Config Generator

Generate Nginx configuration blocks for your server.

Open Graph Tag Generator

Generate Open Graph and Twitter Card tags for social media sharing.

Password Generator

Generate secure random passwords online for free. Configure length, uppercase, numbers and symbols.

QR Code Generator

Generate QR codes from text or URLs online for free.

WiFi QR Code Generator

Free WiFi QR code generator. Create a QR code that lets guests connect to your network instantly by scanning.

Random Number Generator

Free online random number generator. Generate random numbers in any range, roll dice, and flip coins.

README Generator

Generate a professional README.md for your project.

robots.txt Generator

Generate a robots.txt file for your website with custom rules.

UUID/GUID Generator

Free online UUID/GUID generator. Create random v4 UUIDs in bulk and validate existing UUIDs instantly.

WhatsApp Link Generator

Generate wa.me links with optional message. Share direct WhatsApp links.

Converters(29)

Area Unit Converter

Convert between m², km², hectares, acres, ft², and mi² online.

Byte & Storage Unit Converter

Free online tool to convert between bytes, KB, MB, GB, TB, and PB. Supports both base 1000 and 1024 (binary).

Color Converter (HEX, RGB, HSL)

Free online color converter. Convert colors between HEX, RGB, and HSL with live preview. Copy values in any format.

CSV to JSON Converter

Free online CSV to JSON converter and vice versa. Handles fields with commas, quotes, and nested data.

CSV to JSON

Convert CSV to JSON online. Paste CSV data and get a JSON array of objects.

Fuel Cost Calculator

Free online fuel cost calculator for road trips. Enter distance, fuel consumption, and price to estimate total cost.

HTML to Markdown

Convert HTML to Markdown online.

Image to Base64 Converter

Free online tool to convert images (PNG, JPG, GIF) to Base64 data URI strings for embedding in HTML and CSS.

JSONPath Tester

Test JSONPath expressions against JSON data in real time.

JSON to CSV

Convert JSON to CSV online. Paste an array of objects and get a CSV file.

JSON to TypeScript Converter

Free online tool to convert JSON objects to TypeScript interfaces automatically. Paste JSON and get type definitions instantly.

JSON to XML

Convert JSON to XML online for free.

JSON to YAML Converter

Convert between JSON and YAML easily. Paste your JSON or YAML and get instant conversion.

Length Converter

Free online length converter. Convert between mm, cm, m, km, inches, feet, yards, and miles instantly.

Markdown to HTML

Convert Markdown to HTML online.

Number Base Converter

Free online tool to convert numbers between decimal, binary, octal, and hexadecimal instantly.

Number to Words Converter

Convert numbers to words. Supports Portuguese, English, and Spanish. Perfect for checks, contracts, and documents.

PX to REM Converter

Free online PX to REM converter and vice versa. Set a custom base font size for responsive CSS design.

Roman Numeral Converter

Free online Roman numeral converter. Convert between decimal numbers and Roman numerals (I, V, X, L, C, D, M).

SASS/SCSS to CSS

Convert basic SCSS to plain CSS by resolving variables and nesting.

Speed Unit Converter

Free online speed unit converter. Convert between km/h, mph, m/s, and knots instantly.

Temperature Converter

Free online temperature converter. Convert between Celsius, Fahrenheit, and Kelvin instantly.

Text to Binary Converter

Free online text to binary converter. Convert text to binary (UTF-8) and decode binary back to text.

Time Unit Converter

Free online time unit converter. Convert between seconds, minutes, hours, days, weeks, months, and years.

TypeScript to JavaScript

Strip TypeScript types and annotations to get plain JavaScript.

All-in-One Unit Converter

Free online unit converter for length, weight, temperature, speed, area, volume, time, and data storage.

Unix Timestamp Converter

Convert Unix timestamps to human-readable dates and back. See the current timestamp in real time.

Weight & Mass Converter

Free online weight converter. Convert between milligrams, grams, kilograms, pounds, ounces, and tons.

XML to JSON

Convert XML to JSON online for free.

Text Tools(19)

ASCII Art Generator

Free online ASCII art generator. Transform text into ASCII art with multiple fonts: Banner, Doom, Block, Shadow, and more.

Case Converter

Free online case converter. Transform text between UPPERCASE, lowercase, camelCase, snake_case, kebab-case, and more.

Emoticons & Kaomoji Copy

Free collection of 200+ emoticons and kaomoji organized by category. Click to copy text faces to your clipboard.

Fancy Text Generator

Free fancy text generator. Transform text into Unicode styles: bold, italic, script, monospace, circled, and more to copy.

Add Line Numbers

Free online tool to add or remove line numbers from text. Useful for code snippets and document formatting.

List Sorter

Free online list sorter. Sort lines alphabetically, reverse order, shuffle randomly, or remove duplicates.

Add Prefix & Suffix to Lines

Free online tool to add a prefix and/or suffix to each line of text. Great for wrapping lines in quotes or tags.

Regex Tester & Debugger

Free online regex tester. Test regular expressions in real time with highlighted matches, captured groups, and match details.

Remove Duplicate Lines

Free online duplicate line remover. Remove repeated lines from text with case sensitivity and whitespace options.

URL Slug Generator

Convert text to URL-friendly slugs. Automatically removes accents, special characters, and spaces.

Stacked/Zalgo Text Generator

Free Zalgo and stacked text generator. Add combining diacritical characters above text for glitch-style effects.

Find & Replace Text

Free online find and replace tool. Search and replace text with regex support and occurrence counting.

Unicode Symbols Copy & Paste

Free collection of 300+ Unicode symbols: arrows, math, currency, stars, hearts, and more. Click to copy to clipboard.

Text Diff & Compare

Free online text diff tool. Compare two texts side by side and see added, removed, and unchanged lines highlighted.

Text Repeater

Free online text repeater. Repeat any text N times with a custom separator between repetitions.

Reverse Text Tool

Free online tool to reverse text, words, or lines. Flip strings backwards, mirror text, or reverse line order.

Text Statistics & Analyzer

Count characters, words, sentences, paragraphs, and calculate reading and speaking time for your text.

Word Cloud Generator

Free online word cloud generator. Analyze word frequency and create a visual word cloud from any text.

Word Counter

Free online word counter. Count words, characters, sentences, and reading time with keyword density analysis.

Crypto & Hashing(8)

AES Encrypt & Decrypt

Free online AES encryption tool. Encrypt and decrypt text with AES-256-GCM securely in your browser.

Password Hash Generator

Free online password hash generator. Create secure hashes using SHA-256 with random salt, all in the browser.

Caesar Cipher & ROT13

Free online Caesar cipher and ROT13 tool. Encrypt and decrypt text with a configurable shift (1-25).

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

Free online hash generator. Create MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes securely in your browser.

HMAC Generator

Free online HMAC generator. Create HMAC signatures with SHA-256, SHA-384, or SHA-512 in your browser.

Morse Code Translator

Free online Morse code translator. Convert text to Morse code and back with audio playback in your browser.

RSA Key Generator

Generate RSA key pairs (public and private) in the browser.

TOTP Generator

Generate TOTP codes (Google Authenticator) from a secret key.

Network Tools(8)

DNS Lookup Tool

Free online DNS lookup tool. Query A, AAAA, CNAME, MX, NS, TXT, and SOA records for any domain.

HTTP Headers Inspector

View HTTP response headers of any URL.

IP Geolocation Lookup

Free IP geolocation lookup. Find the city, country, ISP, coordinates, and timezone for any IP address.

IPv4 Subnet Calculator

Free online IPv4 subnet calculator. Compute network address, broadcast, subnet mask, CIDR, and host range.

What Is My IP Address

Find your public IP address instantly. See your city, country, ISP, timezone, and other connection details.

Internet Speed Test

Free online internet speed test. Measure your download speed and latency (ping) in seconds.

URL Parser & Analyzer

Free online URL parser. Break down any URL into protocol, host, port, path, query parameters, and fragment.

User Agent Parser

Free online User Agent parser. Detect browser name, version, operating system, and device type from any UA string.

Media Tools(6)

Color Blindness Simulator

Free online color blindness simulator. See how colors appear to people with protanopia, deuteranopia, and tritanopia.

Image Compressor

Free online image compressor. Reduce file size by adjusting JPEG quality. Compare before and after sizes instantly.

Image Cropper

Free online image cropper. Crop images directly in your browser and download the result as PNG. No upload needed.

Image to Grayscale Converter

Free online tool to convert images to black and white. Before/after preview with instant download.

Image Resizer

Free online image resizer. Resize images in your browser with aspect ratio lock. Download as PNG instantly.

SVG to CSS Background Converter

Free online SVG to CSS converter. Convert SVG code to CSS background-image using base64 or URL encoding.

Dev Reference(20)

ASCII Table

Full ASCII table with decimal, hexadecimal, octal and character.

chmod Calculator

Free online chmod calculator. Convert Linux file permissions between octal (755) and symbolic (rwxr-xr-x) notation.

CNPJ Generator & Validator

Generate and validate numeric and alphanumeric CNPJs (new 2026 format). Official algorithm with check digits.

Color Contrast Checker

Check color accessibility according to WCAG 2.0 guidelines.

Test Credit Card Number Generator

Generate valid test credit card numbers using the Luhn algorithm for development. Supports Visa, Mastercard, and Amex.

Crontab Expression Parser

Free online crontab parser. Convert cron expressions to human-readable descriptions with presets for common schedules.

CSS Selectors Reference

Complete reference of CSS selectors with examples.

Docker Cheatsheet

Quick reference of Docker commands with search and category filter.

Git Commands Cheatsheet

Free Git commands cheatsheet. Categorized reference with descriptions, examples, and common workflows.

HTML Colors Reference

Complete reference of all 140+ named CSS/HTML colors with hex codes, RGB values, and live preview.

HTML Entities Table

HTML entities reference with name, number and character.

HTTP Status Codes Reference

Complete reference of all HTTP status codes with descriptions. Search by code, name, or description.

JavaScript Array Methods

Complete reference of JavaScript Array methods with examples.

Keyboard Shortcuts Reference

Free keyboard shortcuts cheatsheet for VS Code, Chrome, Windows, and Mac. Search and copy hotkeys instantly.

Linux Cheatsheet

Quick reference of Linux/Unix commands with search.

MIME Types Reference

Searchable reference table of file extensions and MIME content types. Find the right Content-Type for any file.

Python Cheatsheet

Quick reference of Python syntax and patterns.

Regex Cheatsheet

Quick reference of regular expressions with examples.

SQL Cheatsheet

Quick reference of SQL commands with examples.

Tailwind CSS Cheatsheet

Quick reference of Tailwind CSS classes with CSS equivalent.

Math & Calculators(6)

Aspect Ratio Calculator

Free online aspect ratio calculator. Calculate and resize dimensions while maintaining proportions (16:9, 4:3, etc.).

BMI Calculator

Free online BMI calculator. Calculate your Body Mass Index with metric and imperial units. See your health category.

Ovulation & Fertility Calculator

Free ovulation calculator. Find your fertile window, ovulation day, and next period date based on your menstrual cycle.

Percentage Calculator

Free online percentage calculator. Solve X% of Y, find what % X is of Y, and calculate percentage change between values.

Pregnancy Due Date Calculator

Free pregnancy due date calculator. Find your estimated due date, gestational age, trimester, and key milestones.

Unit Circle / Trig Calculator

Free interactive unit circle and trigonometry reference. Explore sine, cosine, tangent values for any angle.

Date & Time(15)

Date Add/Subtract Calculator

Free online date calculator. Add or subtract days, months, or years from any date to find a future or past date.

Age Calculator

Free online age calculator. Find your exact age in years, months, and days from your birthdate, plus next birthday.

Business Days Calculator

Free online business days calculator. Count working days between two dates, excluding weekends and holidays.

Online Calendar

Free online calendar viewer. Browse any month and year with today highlighted and week numbers displayed.

Countdown Timer

Free online countdown timer to any date. See remaining days, hours, minutes, and seconds in real time.

Day of the Year Calculator

Find out what day of the year it is (1-365/366). See year progress percentage and remaining days at a glance.

Days Between Dates Calculator

Free online date difference calculator. Find the exact number of days, months, and years between two dates.

Hours Calculator

Free online hours calculator. Sum multiple time entries in hours and minutes. Great for tracking work hours.

Moon Phase Calculator

Free online moon phase calculator. Find the lunar phase for any date with illumination percentage and visual symbol.

Pomodoro Timer

Free online Pomodoro timer for productivity. Customizable work (25 min), break (5 min), and long break (15 min) intervals.

Season of the Year

Find the current season for any date. Supports both Northern and Southern hemispheres with equinox and solstice dates.

Online Stopwatch

Free online stopwatch with lap functionality. Start, stop, record split times, and reset with millisecond precision.

Week Number Calculator

What week is it? See the current ISO week number, year progress percentage, and weeks remaining.

World Clock

Free online world clock. See the current time in multiple cities and time zones around the world with live updates.

Zodiac Sign Calculator

Free online zodiac sign calculator. Find your astrological sign from your birth date with symbol, element, and traits.

Finance Calculators(5)

First Million Calculator

Free calculator to see how long it takes to reach 1 million with monthly deposits and compound interest.

Fraction Calculator

Free online fraction calculator. Add, subtract, multiply, and divide fractions with automatic simplification.

Loan & Mortgage Calculator

Free online loan calculator. Enter amount, interest rate, and term to calculate monthly payments and total cost.

Rule of Three Calculator

Free online proportions calculator. Solve rule of three problems: enter 3 values to find the unknown fourth.

Compound Interest Calculator

Free online compound interest calculator. Simulate savings growth with initial amount, monthly deposits, rate, and period.

Fun & Games(13)

Online Dice Roller

Free online dice roller. Roll 1-10 dice with D6, D8, D10, D12, or D20. See individual results and totals for RPG games.

Online Drawing Canvas

Free online drawing tool. Sketch freely with brushes, colors, eraser, undo support, and PNG download.

Instagram Giveaway Picker

Free Instagram giveaway winner picker. Paste comments and randomly draw winners from participants.

Instagram Unfollow Tracker

Compare two Instagram follower exports to find out who unfollowed you. Free and private - runs in your browser.

Instagram Non-Followers Checker

Free tool to find who you follow on Instagram that doesn't follow you back. Uses your data export - 100% private.

What Is My Location

Find your current GPS coordinates using browser geolocation. Copy latitude/longitude or open in Google Maps.

Online Notepad

Online notepad with auto-save. Create and manage multiple notes in your browser.

Random Name Picker

Free online random name picker and raffle tool. Paste a list of names and draw one or more winners instantly.

Random Word Generator

Free random word generator for games like Pictionary, Charades, and brainstorming. Supports multiple languages.

List Randomizer

Free online list randomizer. Shuffle and randomize the order of items in any list using the Fisher-Yates algorithm.

Speed Reading (RSVP)

Free online speed reading trainer using RSVP. Read faster by seeing one word at a time at configurable WPM speed.

Spin the Wheel

Free online spinner wheel. Add custom items and spin to randomly pick a winner. Great for decisions and games.

Typing Speed Test

Free online typing speed test. Measure your WPM (words per minute) and accuracy in real time.