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Regex Tester
Test regular expressions in real-time with match highlighting.
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Frequently Asked Questions
How do I test regular expressions online?
Enter your regex pattern between slashes, set flags (g, i, m, s, u), and type test text. The tool shows all matches with position and length in real-time.
What regex flags are available?
Global (g) finds all matches, Ignore Case (i) makes matching case-insensitive, Multiline (m) anchors work on lines, Dot All (s) makes dot match newlines, Unicode (u) enables full Unicode matching.
Is this regex tester free?
Yes, completely free with real-time matching. Great for debugging regex patterns before using them in code.