Free Developer Tools with DevToolKit
Free online developer tools. Regex tester, cron builder, JWT decoder, CSS/JS minifier, SQL formatter, and more.
All Tools
Regex Tester
Test regular expressions with live highlighting
Cron Builder
Build and test cron expressions visually
JWT Decoder
Decode and inspect JSON Web Tokens
UUID Generator
Generate random UUID v1 and v4 strings
SQL Formatter
Format and beautify SQL queries
JS Minifier
Minify JavaScript code
CSS Minifier
Minify CSS stylesheets
HTML Encoder
Encode and decode HTML entities
Diff Checker
Compare two texts line by line
Markdown Preview
Write Markdown with live HTML preview
🤖 AI 开发资源
Fast
Instant results in browser
Private
No data leaves your device
Free
No signup required
Mobile
Works on all devices
Advertisement