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Free online tool

Regex Tester

Test regular expressions against sample text with flags and match details.

Enter values to begin.

How to use this tool

  1. 1. Add your inputEnter or paste the data you want to work with.
  2. 2. Review the live resultThe tool updates automatically as your input changes.
  3. 3. Copy the resultCopy the generated output when it is ready.

Frequently asked questions

Which regex flags are supported?

The tool supports common JavaScript flags including global, case-insensitive, multiline, dotAll, Unicode and sticky.

Can it show captured groups?

Yes. Each match includes its full value, index and captured groups when available.

Is my sample text uploaded?

No. The regex and sample text are processed locally in your browser.

Tool guide

About Regex Tester

What is Regex Tester?

Regex Tester is a free browser-based utility designed to test regular expressions against sample text with flags and match details.

Developer tools support inspection, validation and debugging.

When to use Regex Tester

Use this tool for a quick result without installing a separate application.

Review important results in the destination system.

Practical tips

Check the input format before relying on the result.

Keep a copy of important original data.

Privacy and processing

This tool is designed to process its working input in your browser.

Avoid confidential material on an untrusted device.

Continue working

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