Regex Tester
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Regex Tester
This tool is coming soon — check back shortly! We're building it right now.
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How to Use Regex Tester
- Enter your regex pattern in the pattern field
- Set flags (global, case insensitive, multiline) as needed
- Type your test string in the test area
- Matches are highlighted in real time
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Features
- Real-time match highlighting in test string
- Capture group display with group names
- Support for all JavaScript regex flags (g, i, m, s, u)
- Match count and position display
- Common regex pattern library
What is Regex Tester?
Write and test regular expressions in real time. See matches highlighted in your test string, capture groups displayed, and get plain-English explanations of your regex pattern — perfect for debugging complex patterns.
Frequently Asked Questions
JavaScript's built-in RegExp engine — the same as your browser. This is compatible with most modern regex engines.
Capture groups are parts of a regex wrapped in parentheses (). They 'capture' the matched text for later use or reference.
The global flag (g) finds all matches instead of stopping after the first match.