Regex Tester Online - Free & Local

Regex Tester is a free ComTools utility that test regular expressions online. Data is processed locally in your browser; nothing is uploaded.

Regular expression

Test text

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What is Regex Tester?

Regex Tester is a free ComTools utility that test regular expressions online. Data is processed locally in your browser; nothing is uploaded.

Free to use
No signup required
Local processing
Data is processed locally in your browser; nothing is uploaded.
Bilingual UI
Chinese and English supported
Developer friendly
Test regular expressions online

QIs my data uploaded?

Data is processed locally in your browser; nothing is uploaded.

QIs it free?

Yes, completely free with no usage limits.

QWhich browsers are supported?

Modern browsers: Chrome, Edge, Firefox, Safari.

QHow to report issues?

See the About page for contact options.