Regex Tester
Test regular expressions with live match highlighting and capture groups.
Processed entirely in your browser
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Test regular expressions with live match highlighting and capture groups.
Test and debug regular expressions in three simple steps.
Enter a regular expression pattern and toggle flags as needed.
Paste or type the text you want to match against your pattern.
View highlighted matches, capture groups, and replacement output in real time.
Your patterns and test data never leave your browser.
See matches highlighted instantly as you type your pattern.
View each match with all its capture groups and indices.
Just open the page and start testing. No sign-ups or logins required.