FillJob AI
Regex Tester
Test regular expressions with live match highlighting, named capture groups, and full flags support. No sign-up needed.
//
Hello World! This is a test string.
Another line with hello@example.com
Frequently Asked Questions
What regex flavors are supported?
The regex tester uses JavaScript's built-in RegExp engine, which supports lookaheads, lookbehinds, named capture groups, and all standard flags (g, i, m, s, u, y).
Can I test multiline patterns?
Yes. Enable the 'm' flag to make ^ and $ match line boundaries, and the 's' (dotAll) flag to make '.' match newline characters.
Is my text data stored?
No. Everything runs entirely in your browser. No data is sent to a server.
Can I test named capture groups?
Yes. Use the (?<name>...) syntax for named groups — they'll be displayed separately in the results.
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