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Regex Tester
Developer Utilities

Regex Tester

Test regular expressions with live match highlighting

Processed locally in your browser.

Accepted upload: .txt · max 5 MB. Matching runs locally in your browser.

Pattern

JavaScript-style regular expression (without surrounding slashes)

//g
0 characters
Flags

Toggle JavaScript RegExp flags. Changes apply instantly.

Test text

Matches update as you type

0 charactersAwaiting valid pattern

Highlighted matches

Fix the pattern to see highlights

Add test text to highlight matches.

Match details

Capture groups and index ranges for each match

Enter a pattern to start matching.

Tags

regexregexppatternmatchtest

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