Free Online Developer Tools
JSON, Regex, Cron, SQL, Color, Diff, JWT — no login required.
{}
JSON Formatter
Format, minify and validate JSON with syntax error detection.
.*
Regex Tester
Test regular expressions with real-time match highlighting.
⏰
Cron Builder
Description
🗄️
SQL Formatter
Format SQL queries for Standard SQL, MySQL, PostgreSQL, SQLite and T-SQL.
🎨
Color Picker
Pick colors and convert between HEX, RGB and HSL with palette shades.
±
Text Diff
Compare two texts and see added, removed and unchanged lines.
🔑
JWT Decoder
Decode and inspect JWT tokens — header, payload, expiry and signature.