Free • No signup • Works offline
Regex Tester — Test Regular Expressions Online
Last updated: June 1, 2026
Test and debug regular expressions instantly. Highlights matches in real-time. Supports JavaScript Regex syntax.
How to use this tool
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Enter or paste your data into the input field above.
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Configure any necessary options or click the primary action button.
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Copy the generated result to your clipboard using the copy button.
Frequently Asked Questions
What is Regex Tester?
Test and debug regular expressions. It runs entirely in your browser without sending any data to a server.
Is this tool safe and private?
Yes, absolutely. Because the processing happens 100% locally in your browser (client-side), your data never leaves your computer.
Does it work offline?
Yes. Once you load this page, the underlying scripts are cached. You can disconnect from the internet and still use the tool.
Is there an API available?
Not currently. DevXTools is designed as a client-side interface for developers to run utilities quickly.
How much does it cost?
It is completely free to use without any sign-ups or limits.
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