Regex Tester & Visualizer
Test, debug, and visualize regular expressions in real time. Perfect for JavaScript, Python, and general pattern matching. Use this tool to practice regex for interviews, data cleaning, scripting, and backend development.
g=global, i=case-insensitive, m=multiline, s=dotAll, u=unicode, y=sticky
Match Results
2 matchesHighlighted Matches
💡 How to Use This Regex Tester
- •Create or paste a pattern into the regex input field
- •Add sample text to test against in the Test String area
- •Toggle flags (g, i, m, etc.) to modify pattern behavior
- •View matched groups and highlighted results in real-time
- •Use examples to learn common patterns for emails, URLs, and more
- •Enable Auto-test to see updates as you type
This free online Regex Tester helps you debug and visualize regular expressions used in JavaScript, Python, PHP, C#, Java, and databases. Use this tool to validate emails, extract data from text, clean CSV files, perform search-and-replace operations, and prepare for coding interviews. Ideal for learners following our programming courses on LearnCodingFast. Practice pattern matching, understand capturing groups, test global and case-insensitive flags, and master regex syntax with instant visual feedback.