Regex Tester
Test regular expressions with real-time highlighting and match groups.
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Test String
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Highlighted Matches
Match Details
Key Features
Test regular expressions with real-time matching
Highlight matches and capture groups
Library of common regex patterns
Free online regex testing tool
Frequently Asked Questions
How do I test a regular expression?
Enter your regex pattern in the pattern field and your test text in the input area. The tool will highlight all matches and show capture groups in real-time.
What regex features are supported?
Our tester supports most regex features including character classes, quantifiers, groups, lookaheads, lookbehinds, flags (g, i, m, s, u, y), and Unicode patterns.
Can I save and reuse regex patterns?
Yes, our tool includes a library of common regex patterns that you can quickly use. You can also build and test your own patterns for immediate use.
How are capture groups displayed?
Capture groups are shown separately with their matched content, making it easy to debug complex patterns and extract specific parts of your text.
Is this regex tester free to use?
Yes, our regex tester is completely free with no limitations on pattern complexity or test text length.
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