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DevME

Regex Tester

Test and debug regular expressions

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FAQ

Regex Tester

Does DevME support all JavaScript regex features?
Yes. DevME uses JavaScript's native RegExp engine. All JS regex syntax is supported including lookaheads, lookbehinds, named capture groups, and all standard flags: g, i, m, s, u, and y.
Can I see which capture groups matched in my pattern?
Yes. DevME displays all capture groups and named groups in a separate results panel. Match indices and group contents are shown for every match, making it straightforward to debug complex capture patterns.
How do I test a regex that should match across multiple lines?
Enable the m (multiline) flag in DevME. With multiline mode, ^ and $ match the start and end of each line rather than the entire string. Add the s flag to make the dot (.) match newline characters as well.

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