Professional Tools • Private by Design
Free Online Regex Tester & Validator
Test, debug, and validate regular expressions online with our free Regex Tester. Instantly see real-time matches, apply flags, and fine-tune your regex patterns in a secure browser environment. No installation, no data sharing—ideal for developers, QA, and students.
About This Tool
Learn what makes this tool special
Quickly prototype and debug regular expressions with live match highlighting and helpful error feedback. Toggle flags, inspect captured groups, and iterate on patterns in a safe, sandboxed environment. Runs entirely in your browser for privacy, making it ideal for learning, QA, and data-cleanup tasks.
Key Features
What makes this tool special
- Real-time regex pattern testing and validation
- Instant match highlighting for test strings
- Supports all JavaScript RegExp flags and syntax
- No data leaves your browser—100% private
- Perfect for debugging, learning, and QA
Quick Guide
Master this tool in seconds
- 1Enter your regex pattern and flags.
- 2Paste your test string and click Test.
Common Questions
Everything you need to know
Q.Does it support all JS regex features?
A.
Yes, it uses the browser's RegExp engine.
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