Regex Tester

How to use Regex Tester

1. Enter test text and the expression in separate fields.
2. Choose expression flags and process the matches.
3. Review the matched values and positions.

Example

Pattern \b\w+@\w+\.\w+\b with flag g

Limits, privacy and troubleshooting

200,000 characters; 1-second execution timeout and 200 displayed matches.

When something goes wrong

Invalid expressions fail clearly; expensive patterns are limited by a worker timeout.

Your inputs are processed in your browser. Engine files may download from this site, but private input data is not uploaded. Reset clears this session; delete downloads separately. Privacy details.

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Before you use the result

Keep a copy of your original. Check the output using the app or website where you intend to use it. A successful conversion does not guarantee acceptance by another service.

Are these tools free?

Yes. No account or payment is required. Browser memory and the input limits shown on each tool determine what can be processed.

Where are my files processed?

On your device. OCR and video tools load their engines from this website. The direct-video downloader connects to the URL you provide. Read the privacy policy.