Regex Tester
Test and debug regular expressions instantly
Free, fast, and privacy-friendly online regex tester tool
What is a Regex Tester?
Regex Tester is a free online tool that lets you instantly test and debug regular expressions. Whether you're learning regex, validating input, or developing complex patterns, this tool makes it fast and easy. It's perfect for developers, QA engineers, and anyone working with text processing.
Why use this Regex Tester?
- Test and debug regular expressions instantly
- See matches and errors in real time
- Great for validation, search, and data extraction
- Mobile-friendly and privacy-focused
How to use the Regex Tester
- Enter your regular expression and flags.
- Paste or type the test string.
- Click Test Regex to see matches and results.
Frequently Asked Questions
What is regex?
Regex (Regular Expression) is a powerful pattern-matching language used to search, match, and manipulate text based on specific patterns.
Is this tool free and private?
Yes! All pattern matching happens in your browser. No data is sent to any server.
What regex features are supported?
This tool supports all standard JavaScript regex features including character classes, quantifiers, groups, lookaheads, and flags (g, i, m, s, u, y).