Regex Tester
Write a regular expression and test it live against sample text, with matches highlighted instantly so you can debug and refine your pattern.
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0 matches found
About the Regex Tester
A regex tester lets you write a regular expression and test it live against sample text, highlighting matches so you can debug and refine your pattern.
How to use
1
Enter your regular expression pattern.
2
Paste sample text to test it against.
3
View highlighted matches and adjust your pattern as needed.
Frequently asked questions
Does this support different regex flavors?
Most browser-based regex testers use JavaScript's regex engine, so patterns relying on features specific to other languages like PCRE may behave slightly differently.
How do I test regex flags like case insensitivity?
Most regex testers let you toggle common flags such as global, case insensitive, and multiline matching alongside your pattern.
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