Developer tool
Regex Tester
Enter a pattern, choose flags and test it against your text instantly.
Runs in your browser. No upload.
Regular expressions run locally in your browser.
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About this tool
Regex Tester made simple.
Use it to debug patterns before putting them in JavaScript, a form validation rule or a search workflow. Everything runs locally.
Common questions
About regex tester.
How do I test a regular expression?
Enter a JavaScript regular expression, add any flags you need, paste sample text and select Test expression.
Which regex flags can I use?
Use flags supported by JavaScript regular expressions, such as g for all matches, i for case-insensitive matching and m for multiline matching.