Test regular expressions with live match highlighting
Our Regex Tester is a powerful tool for testing and debugging regular expressions in real-time. With live match highlighting, group extraction, and support for multiple flavors (JavaScript, Python, PCRE), this tool helps developers write and validate regex patterns quickly. See matches, captures, and replacements instantly as you type, making regex development fast and error-free.
Live match highlighting
Shows capture groups
Multiple regex flavors supported
Replacement pattern testing
Detailed match information
Common regex pattern library
Share regex patterns via URL
Enter your regex pattern, add test text, and see matches highlighted in real-time. Adjust flags (global, case-insensitive, multiline), view capture groups, and test replacement patterns.
If you found Regex Tester useful, try these similar tools:
1. Enter your regex pattern in the pattern field
2. Choose flags (global, case insensitive, multiline)
3. Enter test string to match against
4. View highlighted matches and details