Regex Tester
Test regular expressions with live matching, highlighting, and capture groups. Free, private — nothing leaves your browser.
Your files are processed locally and never uploaded.
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How to Test Regular Expressions
Enter your regex pattern and flags, then type your test string. Matches are highlighted in real-time with capture groups shown below.
Why Use Our Regex Tester?
- Free, no registration required
- Real-time match highlighting
- Shows capture groups
- Multiple regex flag support
- Match count display
- Works on any device
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