Instantly displays match results as you type β no button clicks needed.
Matched text is automatically highlighted with a distinct background color.
Shows match positions, indices, and captured group details for each match.
Built-in common regex patterns for one-click insertion and testing.
All processing happens locally in your browser. No data uploaded to any server.
No registration, no limits. Free to use forever.
A step-by-step guide from basic syntax to practical applications β master the powerful tool of text pattern matching.
Beginner GuideA curated collection of the most practical regex patterns for email validation, URL matching, password strength, and more.
Pattern CollectionLearn about regex performance pitfalls, how to write efficient patterns, and how to prevent ReDoS attacks.
AdvancedA comprehensive look at JavaScript's RegExp object, flags, methods, and the latest ES2024 regex features.
JavaScript