Regex Tester
Test JavaScript regular expressions with live highlighting
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About Regex Tester
Test and debug regular expressions with live matching.
Regex Tester is a free developer tool on AllYour.Tools, built for fast everyday use directly in your web browser. It is designed for people searching for Regex Tester online, a free Regex Tester tool, or a private browser-based alternative that works without installing extra software.
The tool runs locally in your browser whenever possible, so your files, text, and settings stay on your device instead of being uploaded for server-side processing. That makes it useful for quick personal tasks, developer and creator workflows, and privacy-sensitive work where speed and control matter.
How to use Regex Tester
- Open Regex Tester in your browser.
- Add the text, file, or settings the tool asks for.
- Review the result on the page and adjust the options if needed.
- Copy, download, or use the result in your workflow.