Regex Tester – Free Online Regular Expression Tester

✓ Free Regex Tester & AI-Powered Generator

Test and debug regular expressions with real-time match highlighting. Supports all JavaScript regex flags (g, i, m, s, u).

• 🔍 Real-Time Highlighting — See matches highlighted in the test string instantly as you type or modify your regex.
• 🚩 All Flags Supported — Toggle global (g), case-insensitive (i), multiline (m), dotAll (s), and unicode (u) flags.
• 📊 Match Information — Shows match count, captured groups, index positions, and named groups for each match.
• 📝 Pattern History — Recent patterns are saved locally so you can reuse them.

Full guide, how-to & FAQ →

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