Regex Tester client-side ?
How to use Regex TesterThe regular expression tester matches a pattern against sample text in real time. Matches are highlighted as you type, and capture groups are broken out to make debugging easier.
Use it to validate an email format, extract data from a log, or refine a pattern before you drop it into your code. Evaluation runs in your browser using the JavaScript regex engine, so your text and pattern stay private
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The regular expression tester matches a pattern against sample text in real time. Matches are highlighted as you type, and capture groups are broken out to make debugging easier. Use it to validate an email format, extract data from a log, or refine a pattern before you drop it into your code. Evaluation runs in your browser using the JavaScript regex engine, so your text and pattern stay private
The regular expression tester matches a pattern against sample text in real time
How to use Regex Tester
The regular expression tester matches a pattern against sample text in real time. Matches are highlighted as you type, and capture groups are broken out to make debugging easier. Use it to validate an email format, extract data from a log, or refine a pattern before you drop it into your code. Evaluation runs in your browser using the JavaScript regex engine, so your text and pattern stay private
Frequently asked questions
Which regex engine is used?
The tool uses the native JavaScript regex engine in your browser. The syntax is therefore JavaScript flavored, close to most languages but with a few specifics
How do I enable options like case insensitive matching?
You can add the usual flags, for example i to ignore case, g for all matches, and m for multiline mode
Can I see capture groups?
Yes, each match displays its numbered capture groups, which helps you confirm that your pattern extracts the right parts of the text
Is my text sent to a server?
No, the test runs entirely in your browser. Neither the pattern nor the text is transmitted