Regex Tester
Test regex patterns online for free with live match highlighting. See matched groups, positions, and test with global, case-insensitive, and multiline flags.
Test Regular Expressions with Live Highlighting
Test regex patterns online for free with live match highlighting. See matched groups, positions, and test with global, case-insensitive, and multiline flags. AllToolsFree processes everything locally in your browser using JavaScript and WebAssembly — your files are never uploaded to any server. This makes it one of the most private and secure free online tools available.
Frequently Asked Questions
How do I test a regex pattern?
Enter your regex pattern and flags, paste your test string, and matches are highlighted in real time. Click any match to see its position and groups.
What regex flags are supported?
Global (g), case-insensitive (i), multiline (m), and dotAll (s) flags are all supported.
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