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- Free Regex Tester — Test Regular Expressions Online
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✦ Free Online Tool
FREE ONLINE REGEX TESTER
Test and debug regular expressions instantly with highlighted matches. Free regex tester, no signup.
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Invalid regular expression.
Common Regex Patterns
- Email: [a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}
- Numbers: \d+
- Words: \w+
- URL: https?://\S+
Frequently Asked Questions
What is a regular expression?+
A pattern to match text. /[a-z]+/ matches lowercase letters. /\d+/ matches numbers.
What flags are supported?+
g=global (find all), i=case insensitive, m=multiline.
Is it live?+
Yes. Updates as you type.
Is it free?+
Yes, 100% free.