Regex Tester

Build, test, and debug regular expressions with live match results, flags, and copyable matches. Designed for JavaScript regex patterns and everyday debugging.[web:275][web:276][web:282]

0
Matches
Flags
g
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Regex pattern

Enter your regular expression without surrounding slashes. Supports JavaScript regex syntax and flags.[web:275][web:276][web:282]

Matches & groups

View all matches, starting index, and capture groups. Copy all matches with one click for debugging or development.[web:278][web:280][web:291]

Valid regex
0 matches found
No matches yet — adjust your pattern or test text to see results.
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Why use an online regex tester?

Regular expressions are powerful but tricky to debug, so online regex testers provide real-time feedback, match highlighting, and error messages that make pattern building much easier.[web:275][web:276][web:280]

Common regex tester features

  • Live testing of patterns against sample text, with support for flags like global, case-insensitive, and multiline.[web:278][web:280][web:284]
  • Highlighted matches, capture group details, and quick copy buttons for matches or patterns.[web:280][web:287][web:291]
  • Developer-focused UI that works smoothly on desktop and mobile for quick debugging anywhere.[web:281][web:282][web:291]
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