Regex Tester
Test regular expressions in real-time with match highlighting and group extraction.
🔒 No uploads⚡ Instant🆓 Free
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How It Works
1
Enter your regex pattern in the pattern field.
2
Toggle flags (g, i, m, s) to control matching behavior.
3
Paste your test string and see matches highlighted instantly.
Features
✓Real-time regex testing
✓Match highlighting with index positions
✓Capture group extraction
✓Flag toggles (global, case-insensitive, multiline, dotAll)
✓Error reporting for invalid patterns
✓Works completely offline
Frequently Asked Questions
What regex flags are supported?▼
Global (g), case-insensitive (i), multiline (m), and dotAll (s) flags are supported.
Can I see capture groups?▼
Yes! If your regex has capture groups, they are displayed alongside each match.
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