Regex Tester
Test regular expressions and see matches in real-time
Frequently Asked Questions
What are the regex flags and what do they do?
The "g" flag (global) finds all matches rather than stopping at the first. The "i" flag (case insensitive) makes the pattern match regardless of case. The "m" flag (multiline) makes ^ and $ match line beginnings/ends instead of just string beginning/end.
How do I test my regex patterns?
Enter your regex pattern in the top input field and sample text in the text area. Matches will be highlighted in yellow in real-time as you type. The match count is shown at the bottom of the results.
What regex syntax is supported?
The tool supports standard JavaScript regex syntax including character classes, quantifiers, groups, anchors, and escape sequences. Special characters like . ^ $ * + ? {} [] \ | () all work as expected.
Are my regex patterns and text secure?
Yes, all processing happens locally in your browser. Your regex patterns and test text are never sent to any server, ensuring complete privacy and security for sensitive data.