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Regex Tester

Test JavaScript regular expressions against text in a cancellable worker with a time limit.

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How it works

Test JavaScript regular expressions against text in a cancellable worker with a time limit. Enter your values or try the example. Run the action, check the result and copy or download it. Your input remains editable after an error.

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Example

Order 104, order 205 · \d+ · g → 104, 205
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When to use this tool

Test a JavaScript pattern on a sample before using it in your application.

Supported formats & limits

JavaScript RegExp syntax; up to 200,000 text units and a 10,000-character pattern. At most 1,000 matches are shown. Processing stops after 3 seconds; expensive patterns can also be cancelled.

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Good to know

What happens when I change the input?

An edited input needs a new result. Run the action again; previous download links are removed so you cannot mistake an old output for the current one.

Are my files uploaded?

Your files and pasted content are processed in temporary browser memory and are not uploaded for processing. App preferences store only tool IDs, language and theme. There are no accounts, ads or automatic error reports. Closing the page discards your workspace; download results you want to keep. Production pages use Google Analytics for visit statistics; see the Privacy page for details.