Write a regex pattern and test it against sample text with live match highlighting, capture groups, and flags support all client-side.
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Write a regex pattern and test it against sample text with live match highlighting, capture groups, and flags support all client-side.
Add your input to the workspace above, review the result, then copy or download it when it's ready. No account or installation is required.
Regex Tester runs in your browser, so the information you enter stays on your device instead of being uploaded to a server.
A few worked examples so you know what to expect before you paste in your own input.
Input
Pattern: \b[\w.]+@[\w.]+\.\w+\b Text: "Contact us at hello@example.com anytime"
Output
Match: hello@example.com
Input
Pattern: ^\d{3}-\d{3}-\d{4}$
Text: "415-555-0199"Output
Match: 415-555-0199 (full match)
Input
Pattern: ^\d{3}-\d{3}-\d{4}$
Text: "415.555.0199"Output
No match — periods aren't allowed by this pattern, only hyphens.
Regex debugging, text diffs, Markdown to HTML, case conversion, and word counts — the text transforms that show up in every sprint.
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