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Regex Tester
Test and debug regular expressions with live matching, highlighting, and replacement. Supports all major regex flags and features.
Private
Instant
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Enter a pattern and test string to see highlights...
Frequently Asked Questions
What regex flags are supported?
Global (g), Ignore Case (i), Multiline (m), Dot All (s), Unicode (u), and Sticky (y) flags are supported.
How does the highlighting work?
Matches are highlighted in yellow in the test string. Multiple matches are shown with individual highlights.
Can I use capture groups?
Yes! Capture groups are displayed in the match results. Use parentheses () in your regex to create groups.