Developer Utilities
Test regular expressions, format SQL queries for readability, and generate collision-safe UUIDs, three everyday tools in one place.
Convert Unix file permissions between octal (755) and symbolic (-rwxr-xr-x).
Generate and parse cron expressions visually with execution schedules.
Test and debug regular expressions visually.
Beautify and indent complex SQL queries.
Generate secure v4 UUIDs/GUIDs in bulk.
About Developer Utilities
Some tools don't belong to a single theme — they're the utilities you reach for constantly regardless of what you're actually building. This category collects three of them.
The RegEx Tester runs your pattern against a test string using the native JavaScript regex engine, highlighting matches and capture groups in real time. The SQL Formatter takes a dense, single-line query and re-indents it into a structure that's actually reviewable. The UUID Generator produces cryptographically random Version 4 UUIDs in bulk using your browser's native Web Crypto API.
All three run entirely client-side — your queries, patterns, and generated IDs are never sent to a server.