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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
0 / 5,000
//g
Try \d+, hello, [a-z]+, or (\w+)@g
Raw flags
49 / 100,000
ACT II
Results
Ready
Your regex is waiting in the wings.
Enter a pattern above to start matching text.
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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
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Capture groups
Pulling useful pieces out of a match
🎟️ 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.