Does this use the JavaScript regex engine?

Yes. The tool runs in the browser and uses the standard JavaScript (ECMAScript) regex engine.

Is my test data uploaded?

No. All matching is done on your machine.

Can I test capture groups?

Yes. The tool highlights and separates capture group matches.

正则测试

The Regex Tester gives you live feedback as you build and debug patterns. It highlights matches in your test text and supports flags like global and case-insensitive. It runs locally so your test data stays private.

免费 · 无限制 · 浏览器内处理

如何使用

1Enter your regex pattern and set flags (g, i, m).
2Paste the text you want to search.
3See matches and capture groups highlighted in real time.

常见问题

Does this use the JavaScript regex engine?: Yes. The tool runs in the browser and uses the standard JavaScript (ECMAScript) regex engine.
Is my test data uploaded?: No. All matching is done on your machine.
Can I test capture groups?: Yes. The tool highlights and separates capture group matches.