Utilities
Test regular expressions, format SQL queries for readability, and generate collision-safe UUIDs, three everyday tools in one place.
About 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, which turns writing a regular expression from a trial-and-error guessing game into something you can actually see. The SQL Formatter takes a dense, single-line query — the kind that comes out of an ORM's query log or a copy-pasted Stack Overflow answer — and re-indents it into a structure that's actually reviewable, following standard ANSI SQL conventions compatible with MySQL, PostgreSQL, and SQL Server. The UUID Generator produces cryptographically random Version 4 UUIDs in bulk using your browser's native Web Crypto API, for seeding test data, database primary keys, or anywhere you need an identifier that's guaranteed not to collide.
None of these are glamorous, but they're the tools most likely to be open in a tab on any given day. Like the rest of DevToolHub, all three run entirely client-side — your queries, patterns, and generated IDs are never sent to a server.