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Vermillyx Utilities
Regex Tester
Free online regex tester to validate, debug, and experiment with regular expressions in real time.
ACT I
Pattern & Test Text
Try
\d+, hello, or [a-z]+g = global · i = ignore case · m = multiline
ACT II
0 matchesResults
Hello world!
hello WORLD!
Email: test@example.com
Match Details
0 foundNo matches found.
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What is a regular expression?
A quick look behind the curtain
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How does the Regex Tester work?
Putting the pattern through its act
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What do regex flags do?
A few backstage controls
🎟️ Backstage note
Regular expressions are powerful, precise, and occasionally written like someone sneezed on a keyboard. Test your pattern, inspect the matches, and tame the syntax before it reaches production.