RegEx Tester & Evaluator
Test regular expressions against text in real-time with regex flags, match group extraction, capture arrays, and error detection.
How to use RegEx Tester & Evaluator
- Enter text, configure options, or upload a file as required by the tool.
- Click "Run Tool" and review the preview or result.
- Copy the text output or download generated files — downloads are deleted after streaming.
Privacy model
Server-side file tools use temporary storage only. Files are deleted in a finally block after processing or download. No file history is stored.
Common Questions
Frequently Asked Questions
Everything you need to know about using RegEx Tester & Evaluator safely, accurately, and privately.
Is RegEx Tester & Evaluator completely free to use?
Yes, 100% free with no hidden paywalls, mandatory subscriptions, or feature limits. LoomFree provides open digital tools for everyone.
Do I need to install software or create an account?
No account registration or software installation is required. Simply open the tool in any modern web browser and start working immediately.
Is RegEx Tester & Evaluator safe and secure?
Yes. LoomFree enforces modern HTTPS encryption and strict client-side data boundaries. Your inputs, calculations, and files are never sold or permanently archived.
Can I access this tool on mobile phones and tablets?
Yes. All LoomFree utilities are engineered with responsive mobile-first layouts that work across desktop monitors, laptops, iPads, and mobile screens.