Regex Tester

Test regular expressions against sample text and inspect matches quickly.

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Regex Tester

Test JavaScript regular expressions with live match highlighting, flags, capture groups, named groups, presets, match positions, and replacement previews.

Regular expression

Enter a JavaScript regular expression without surrounding slashes.

//g

Flags

Turn JavaScript RegExp options on or off.

g — Find every match instead of stopping after the first.

Examples

Test text

Mode

Status

Valid

/[A-Z]{2}-\d+/g

Matches

Global matching

Capture groups

Across all matches

Characters

2 lines

Live match preview

Matching text is highlighted as you type.

3 matches

Contact hello@infochef.online or support@example.com.
Order IDs: IC-1024, IC-2048, QA-77.

Match details

Inspect values, positions and capture groups.

Match 1

IC-1024

Start 65End 72Length 7

Match 2

IC-2048

Start 74End 81Length 7

Match 3

QA-77

Start 83End 88Length 5

Raw match output

1. "IC-1024"
   index: 65
   end: 72

2. "IC-2048"
   index: 74
   end: 81

3. "QA-77"
   index: 83
   end: 88

Privacy

You can use this tool without an account. Processing stays in your browser; accounts are optional for favorites and history.

How to use

Open Regex Tester and enter the information requested by the form.
Review the calculated result and recommendations.
Copy or reset the result when you are ready to try another scenario.

Examples

Use Regex Tester for a focused developer tools task.
Compare the result against another scenario.
Copy the final output into your notes, project plan, or documentation.

FAQ

Is Regex Tester free?

Yes. Regex Tester is free to use and does not require an account.

Does Regex Tester save my input?

No input is saved unless you are signed in and explicitly use account features that save history or favorites.

Does Regex Tester require login?

No. Login is optional and only adds convenience features such as favorites, recent tools, and synced history.

Can I use Regex Tester on mobile?

Yes. The tool page is designed to work on phones, tablets, laptops, and desktop screens.

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