Regex Tester

Test and debug regular expressions with real-time matching and highlighting.

This free online utility tool runs entirely in your browser. No data is sent to any server — your input stays private and secure.

Features

• Free to use — no signup or registration required
• Works offline — processes everything locally in your browser
• Privacy-first — no data leaves your machine
• Fast and responsive — instant results

Read our developer guides for tips and best practices.