Regex Tester
Write and test Regular Expressions in real-time against sample text with visual highlights. Everything runs entirely in your browser.
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7 Matches
Hello World, this is a Test String with Some Capitalized Words.
Real-time Validation
Validate your Regular Expressions instantly as you type. Our engine provides immediate feedback on syntax errors and performance.
Visual Highlighting
See exactly which parts of your test string match your pattern. Visual cues help you debug complex lookaheads and grouping logic.