Test Your Regular Expressions Instantly

For developers, testers, and text processors who need to validate regex patterns against sample text. See matches, capture groups, and positions in real-time to debug and refine your patterns.

Open the Tool

Why use Regex Tester?

Instant match results with highlighted positions

Capture group details for complex patterns

User-friendly interface for quick testing

Supports all major regex flavors

Free and no sign-up required

How it works

  1. Enter your regular expression pattern in the input field.
  2. Paste or type the text you want to test against.
  3. Click 'Test Regex' to see all matches and capture groups.
  4. Review the results and adjust your pattern as needed.

FAQ

What regex flavors are supported?

Our tester supports JavaScript-compatible regex syntax, which is similar to most modern languages. For advanced features, check compatibility.

Can I see capture groups?

Yes, the tool displays all capture groups for each match, making it easy to debug complex patterns.

Is my data safe?

Absolutely. All processing is done in your browser; no data is sent to any server.

Do I need to escape special characters?

Yes, you should escape special characters as you would in your code. The tool will treat the input as a raw regex pattern.