Encode, decode, format and convert data instantly. All tools run in your browser - no downloads required.
Create QR codes for URLs, WiFi, text and more
Online stopwatch with lap times and keyboard shortcuts
Calculate exact age in years, months, days
Calculate percentages, tips, discounts and more
Test your microphone and audio input
Count words, characters, sentences and paragraphs
Convert length, weight, temperature, volume and more
Calculate your Body Mass Index
Random numbers, dice, coins, list picker
Convert text to uppercase, lowercase, title case
Encode or decode Base64 strings quickly and easily
Encode or decode URLs and query strings
Generate MD5 hash from any string
Generate SHA-1, SHA-256, SHA-512 hashes
Format, beautify and validate JSON data
Beautify and format HTML code
Beautify and minify CSS code
Format and beautify SQL queries
Convert between binary, decimal, hex, octal
Convert between HEX, RGB, and HSL
Convert JSON data to CSV format
Convert timestamps to dates and vice versa
Test and debug regular expressions
Compare two texts and find differences
Count words, characters, sentences
Generate placeholder text
Find your public IP address
Generate secure random passwords
Generate unique UUIDs
Validate email addresses
IQ, EQ, math, pattern, memory and reaction tests with instant scores
Test stereo balance, frequencies, and audio quality
Test your microphone and audio input quality
Test your webcam before video calls
Whether you're a professional developer, web designer, or student learning to code, having quick access to reliable tools is essential for productivity. Our collection of free online developer utilities provides instant solutions to common programming tasks without requiring installations, registrations, or complex setup procedures.
Each tool is carefully designed to solve specific development challenges you encounter daily: encoding data for API transmission, formatting code for readability, converting between number systems, generating secure passwords, validating email addresses, and much more. All processing happens entirely in your browser using JavaScript, meaning your data stays private and never touches our servers.
No waiting, no loading screens. Every tool provides real-time processing as you type, saving you valuable development time.
All operations happen in your browser. Your sensitive data, API keys, and code never leave your device.
Desktop, mobile, tablet—our tools are fully responsive and work on any modern browser without plugins.
Our tools are optimized for speed and accuracy, regularly updated to support the latest web standards, and designed with a clean interface that gets out of your way so you can focus on building great software. Bookmark this page and keep it handy—you'll find yourself reaching for these utilities throughout your development workflow.