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Regex Tester Tool
Test regular expressions.
Enter a pattern and test text to instantly see matches and capture groups.
Instant Matches
See every match in your test text, numbered in order.
Capture Groups
View each capture group's value alongside the full match.
Free & Unlimited
No signup, no watermarks, no limits. Use it as many times as you like.
What is a Regex Tester Tool?
A regex tester helps developers test and validate regular expressions against input text. It is used in validation, search patterns, and data extraction.
Why use this tool?
- Test regex patterns instantly
- Debug validation rules
- Extract data using groups
- Improve API & form validation
Frequently Asked Questions
This tool uses .NET regular expression syntax, which is very similar to PCRE/Perl-style regex used in most languages, though a few advanced features may differ.
Yes. Along with each full match, the tool shows the value captured by any groups defined in your pattern.
Yes. 100% free — no account required, no watermarks, no usage limits.