Online Regex Tester — Live Matching, Groups & Replace
Live matching / capture groups / replace
//
Replace
Common Patterns
Email: \w+@\w+\.\w+ | Mobile: 1[3-9]\d{9} | IP: \d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3} | Chinese: [\u4e00-\u9fa5]+
Related Uses
When writing a regex, use Text Replace to verify bulk replacement; for JSON strings you can also use JSON Formatter to inspect the structure.
FAQ
How do I test a regular expression?
Enter a regex and test text in the input boxes; the tool shows matches in real time, including match positions, matched content and capture groups.
What are some common regular expressions?
Common patterns include email \w+@\w+\.\w+, mobile 1[3-9]\d{9}, IP \d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}, and Chinese characters [\u4e00-\u9fa5]+.
Does the regex tester support replacement?
Yes. Enter the replacement text and click Replace to batch-replace all matches, useful for text cleaning and format conversion.