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Regex Tester

Test regular expressions instantly with live match highlighting & group capture — 100% client-side

Regular Expression
/ /
Flags:
Test String 0 chars
Match Highlights
Matches will be highlighted here…
Matches:0
Groups:0
Status:–
Capture Groups & Details
Run a test to see capture group details.
Quick Examples
Keyboard Shortcuts
Ctrl+Enter Run test
Ctrl+L Clear all
Ctrl+Shift+C Copy output
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How to Use
  1. Enter your regex pattern between the / slashes.
  2. Add flags in the field after the closing slash (g, i, m, etc.) or toggle buttons.
  3. Paste your test string in the textarea.
  4. Click Test or press Ctrl+Enter.
  5. Matches are highlighted in the output.
  6. Capture groups are shown in the table below.
💡 Tips
  • Use g flag for all matches
  • Use (?P<name>…) for named groups
  • Escape special chars with \
  • Use (?:…) for non-capturing groups
Quick Reference
\dAny digit
\wWord char
\sWhitespace
.Any char (except \n)
^ $Start / End
* + ?0+, 1+, 0/1
{n,m}Between n and m
[abc]Character class
(…)Capture group
(?:…)Non-capture group
a|ba or b
\bWord boundary
(?=…)Lookahead
(?<=…)Lookbehind

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