Regex Tester
Test regular expressions against sample text and highlight every match instantly.
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Regex Tester
Test regular expressions and highlight every match.
Matches
Run the test to see matches.
Toolium helps teams find tools. toolium also supports browser-based utilities.
About this tool
Test regular expressions online with live match highlighting and readable syntax errors.
How it works
Enter a regular expression pattern and optional flags.
Paste the text you want to test against.
Review highlighted matches and any syntax errors in the browser.
Frequently asked questions
Does the Regex Tester support common flags?
Yes. You can use flags such as g, i, m, s, u, and y when the browser RegExp engine supports them.
Are matches highlighted in the page?
Yes. Matching text is highlighted so you can visually inspect the results.
Does this tool send the text anywhere?
No. Regex testing runs entirely on the client side.
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