DevTools / Text
Regex Tester
Test a regular expression against sample text and see matches highlighted live, entirely in your browser.
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Runs in your browser · No data uploaded
About this tool
A regex tester lets you write a regular expression pattern and immediately see which parts of your test text it matches, without needing to run code. This is useful for validating a pattern before using it in a script, form validation, or search-and-replace.
FAQ
g matches all occurrences instead of stopping at the first, i makes matching case-insensitive, and m allows ^ and $ to match at line breaks instead of only the start/end of the whole string.