Regex Tester
Test regular expressions with live match highlighting and detailed results.
How to Use
- 1 Enter your regular expression pattern.
- 2 Set flags (g, i, m, s) as needed.
- 3 Enter test text in the input area.
- 4 View matches, groups and any errors.
Features
Live highlighting
Matches are highlighted in the test text.
Flag support
Supports global, case-insensitive, multiline and dotall flags.
Match details
Shows match count, positions and capture groups.
Error handling
Clear error messages for invalid patterns.
Privacy
Your text and patterns never leave your browser. Nothing is uploaded or stored.
This tool processes files or input locally in your browser.
Frequently Asked Questions
Does it execute JavaScript?
No. It only uses the RegExp engine for pattern matching. No arbitrary JavaScript is executed.
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