Developer Tools

JSON formatter, regex tester, color converter, hash generator, UUID generator, diff checker — all in one place.

10 toolsNo signup · Files stay in browser · 100% free

All Developer Tools

Format, validate, and beautify JSON with syntax highlighting.

Test regular expressions with real-time match highlighting.

Convert between HEX, RGB, HSL, HSV, and CMYK color formats.

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text.

Generate v1, v4, and v7 UUIDs. Bulk generate up to 100 at once.

Encode images to Base64 data URIs for embedding in CSS and HTML.

Compare two code snippets with syntax-aware diff highlighting.

Decode JWT tokens instantly. Your token never leaves this tab.

Turn cron expressions into plain English. See next run times.

Convert CSV to JSON and back. Drag, drop, done.