Regex Tester — Free Online Tool
Test regular expressions with live matching and highlighting. Supports JavaScript regex syntax.
Use Regex Tester
Your data stays in your browser. Nothing is uploaded to our servers.
Go to the main tools page to use this tool, or explore the SEO content below.
Use Regex TesterQuick Facts
- 100% free — no signups
- Client-side processing
- No file size limits
- Works on all devices
Related Tools
How to Test Regular Expressions
Regular expressions (regex) are powerful patterns for matching text. Our online regex tester lets you test patterns in real-time with visual highlighting of matches.
Common Regex Patterns
- Email:
^[\w.-]+@[\w.-]+\.[a-zA-Z]{2,}$ - Phone:
^\+?[0-9\s-]{7,15}$ - URL:
^https?:\/\/.+\.[a-z]{2,} - IP Address:
^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$
Regex Flags
- g (global): Match all occurrences
- i (case-insensitive): Ignore case
- m (multiline): ^ and $ match line boundaries
Ready to Build Something Great?
Let's discuss your project and turn your vision into reality. No commitment, just a conversation.
Get in Touch