What regex flavor is used?

Regex Tester

Test and debug regular expressions with live match highlighting, group captures, and flags.

Pro Tip: Minify, format, and parse code locally without exposing confidential tokens.

How It Works

Write and test regular expressions in real time. See all matches highlighted in the test string, view capture groups and their values, toggle flags (g, i, m, s), and get a match summary.

Enter your regex

Type your regular expression pattern.

Enter test string

Paste text to test against.

View matches

Matches highlight in real time.

Key Features & Capabilities

Live match highlighting

Capture group display

All JavaScript regex flags (g, i, m, s, u)

Match count and positions

Common regex reference panel

Frequently Asked Questions

JavaScript (ECMAScript) regex syntax, which is supported natively in all browsers.

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Your files are processed locally in your browser. No data is uploaded to any server.