Developer Tools
Everyday utilities for developers — format, encode, decode, and generate code instantly.
All Tools
21 toolsJSON Formatter
Beautify and validate JSON
Online Code Editor
VS Code-like editor with syntax highlighting and themes.
Responsive Checker
Check website on all devices
Password Generator
Create secure passwords
Base64 Converter
Encode/Decode Base64
URL Encoder/Decoder
Encode or decode URLs
HTML Encoder/Decoder
Encode or decode HTML entities
UUID Generator
Generate Version 4 UUIDs
Vibe Coding Detector
Scan text, websites, and GitHub repos for rushed AI-generated vibe coding patterns
JSON Viewer
View, format, and explore JSON data with a collapsible tree
XML to JSON
Convert XML documents into JSON format
CSS Formatter
Format and beautify minified CSS code
JavaScript Formatter
Format and beautify JavaScript code
Regex Tester
Test regular expressions against your text with live highlighting
Binary to Text
Convert binary code into readable text
Text to Binary
Convert text into binary code
JSON Validator
Validate and inspect JSON with error messages and a data tree
JWT Decoder
Decode and inspect JWT tokens without sending them anywhere
HTML Formatter
Beautify and minify HTML code
SQL Formatter
Beautify and minify SQL queries
API Tester
Send HTTP requests and inspect responses directly in your browser
Why use free developer tools?
Stop reaching for heavyweight apps to do simple jobs. Format and validate JSON, encode URLs, generate UUIDs, decode JWTs, compute MD5 and SHA-256 hashes, and test APIs — all in your browser. These are the exact tools developers use daily, available for free without registration.
Frequently Asked Questions
Are developer tools free?
Yes, all developer utilities are free forever with no limits on usage.
Can I format and validate JSON?
Yes. Our JSON formatter validates your JSON and formats it with a collapsible tree view for easy inspection.
Do you have a JWT decoder?
Yes. Paste any JWT and instantly decode its header and payload. Tokens are decoded in your browser and never uploaded.
Which hash algorithms are supported?
MD5 and SHA-256 generators are available, with more algorithms on the way.