regex tester

Regex Tester

Test JavaScript regular expressions live, inspect matches, and review capture groups client-side.

local only

FAQ

Is the Regex Tester processed locally?

Yes. The Regex Tester runs in your browser so patterns and sample text is not uploaded by the tool.

Can I share a Regex Tester result?

You can copy the current page URL after entering input. The URL preserves the editable input state for reopening.

Does the Regex Tester save my last input?

The browser can remember the latest input for the same tool using localStorage, with reads performed after hydration.

When should I use this Regex Tester?

Use it when you need to test JavaScript regular expressions and inspect matches quickly while reviewing code, API payloads, logs, configs, or snippets.

Can I clear sensitive Regex Tester input?

Yes. Use the clear control or erase the field, then remove saved site data from your browser if needed.