🔍 Regex Tester

Test regular expressions live. Matches are highlighted as you type, with group capture display.

🔒 Runs entirely in your browser — nothing is sent to any server
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Test String
Matches
Enter a pattern above to see matches

When to use this

✅
Validate form inputsTest email, phone, date, or ZIP code patterns before putting them in your code. See exactly which inputs pass or fail.
🪵
Parse log filesExtract error codes, timestamps, or IP addresses from raw log output using a pattern match.
🔎
Find & replace in codeBuild the pattern here first, then paste it into VS Code or your editor's regex find/replace — confident it works.
✂️
Extract structured dataPull phone numbers, URLs, or prices out of a block of unstructured text using capture groups.

Flag reference

g — Find all matches, not just the first
i — Case-insensitive matching
m — ^ and $ match line starts/ends
s — . matches newlines too