Free Regex Tester — Debug Regular Expressions Online
Debug regular expressions with real-time highlighting and groups.
FREENO SIGNUPBROWSER-BASED
Loading Tool...
How to Use Regex Tester
- 1
Enter Regex pattern in the top field.
- 2
Paste sample text into the test area.
- 3
Review colored highlights and group extraction.
- 4
Adjust flags to refine results.
Who Uses Regex Tester?
Validation Logic
Test patterns for email or phone validation.
Data Scraping
Debug complex patterns for processing logs.
Frequently Asked Questions
Which engine does it use?↓
The native browser-based JavaScript engine.
Is my test data private?↓
Yes, all processing happens in browser memory.