Local Processing

Regex Tester Online

Test JavaScript regular expressions and inspect matches, indexes, and groups.

Runs locallyNo uploadYour input is processed in your browser.

Regex Tester

Test JavaScript regular expressions and inspect matches, indexes, and groups.

Examples

Example

Input example
Pattern and text: Pattern: \b\w+@\w+\.com\b
Text: [email protected]
Output example
Matches: [email protected]

Regex Tester processes this example in the browser and lets you inspect the result before copying it.

Extract Order IDs

Input example
Pattern and text: Pattern: ORD-\d+
Text: ORD-1001 shipped, ORD-1002 pending
Output example
Matches: ORD-1001
ORD-1002

Regex Tester processes this example in the browser and lets you inspect the result before copying it.

Validate Slugs

Input example
Pattern and text: Pattern: ^[a-z0-9-]+$
Text: json-formatter
Output example
Result: Match: json-formatter

Regex Tester processes this example in the browser and lets you inspect the result before copying it.

Privacy note

This tool processes your input locally in your browser. Your text, code, file, or generated value is not uploaded to LumaTool servers.

How to use

  1. Step 1. Open the Regex Tester page and paste or enter your input.
  2. Step 2. Choose the action, options, or format you need.
  3. Step 3. Review validation messages before using the result.
  4. Step 4. Copy the output or download it when a download action is available.

Real-world examples

Use Regex Tester for focused browser-based checks and cleanup tasks

Use Regex Tester for focused browser-based checks and cleanup tasks.

Prepare text, values, or technical data before pasting it into anot...

Prepare text, values, or technical data before pasting it into another system.

Inspect edge cases without installing desktop software

Inspect edge cases without installing desktop software.

Common use cases

  • Use Regex Tester for focused browser-based checks and cleanup tasks.
  • Prepare text, values, or technical data before pasting it into another system.
  • Inspect edge cases without installing desktop software.
  • Handle quick utility work on desktop or mobile.
  • Keep pasted content local in your browser.
  • Test JavaScript regular expressions and inspect matches, indexes, and groups.

FAQ

Is Regex Tester free?

Yes. Regex Tester is available as a free LumaTool web tool.

Do I need to sign in?

No sign-in is required for the public tool pages.

Will my input be uploaded?

No. This tool processes input locally in your browser.

Does it work on mobile?

Yes. The editor, buttons, and result areas are designed for mobile and desktop browsers.

Can I copy or download the result?

Ready tools include copy actions, and file-oriented tools include download actions where useful.

What is Regex Tester best used for?

Regex Tester is useful for focused developer tools tasks where you need a quick browser-based result without switching tools.

How is my input handled?

This tool processes your input locally in your browser. Your text, code, file, or generated value is not uploaded to LumaTool servers.

Can I use the output in production work?

Yes, but review the result before applying it to production systems. LumaTool helps with utility work, validation, and formatting, but final decisions stay with you.

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