Regex Tester Online

Test regular expressions with live matching and capture groups. JavaScript regex syntax.

/ /

g (global) i (case insensitive) m (multiline)

Test String

Regex API

Test regex patterns programmatically:

curl -X POST https://api.fengdeagents.site/api/regex \\
  -H "X-API-Key: YOUR_KEY" \\
  -H "Content-Type: application/json" \\
  -d '{"pattern": "\\\\d+", "text": "abc 123 def 456", "flags": "g"}'

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