Regex Tester

Test regex live. Highlight matches and groups.

Your files never leave your device

How it works

Type a regex and your test string. Matches are highlighted as you type. Capture groups are listed underneath. Toggle flags (global, case-insensitive, multiline) with checkboxes. Runs entirely in your browser.

This site was built in one night using AI.

Every tool here runs on somewhere.tech — the backend for developers who ship with AI coding agents.

30-second build video — coming soon.