Regex Tester & Matcher
Test and debug regular expressions with live matches. This regex tester helps you validate patterns, find matches, and refine expressions quickly.
Regex Tester
Input
Character: 0/200000Word: 0Line: 0Sentence: 0
Pattern: /([A-Z])/
Output
Character: 0Word: 0Line: 0Sentence: 0
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How to Use the Regex Tester
Enter your regex: Type the regular expression pattern.
Paste sample text: Add the text you want to test against.
View matches: See highlighted matches and groups.
Why Use Our Regex Tester?
Faster debugging: Find regex issues quickly.
Accurate matching: See exactly what your pattern captures.
Developer friendly: Great for validation and parsing tasks.
Common Uses for Regex Testing
Regex testing helps you build reliable patterns for validation and parsing.
- Validate emails, URLs, or phone numbers.
- Extract data from logs or text.
- Clean and transform text data.
- Debug complex regex patterns.
Frequently asked questions
What does a regex tester do?
It shows matches for your regex pattern against sample text.
Does it support regex flags?
Most testers support flags like global, ignore case, and multiline.
Can I test groups and captures?
Yes. Matches and groups are highlighted for inspection.
Is it free to use?
Yes, the regex tester is free online with no signup required.
Does it work with long text?
Yes. You can test regex on large blocks of text.
Is it good for beginners?
Yes. It helps you see how patterns behave.
Can I use it for validation?
Yes. It is useful for form and input validation.
Does it support Unicode?
Many regex engines support Unicode, but results may vary.
Can I copy the results?
Yes. Copy the matches or pattern output easily.