Regex101

Description

Regex101 is an advanced online regular expression tester and debugger supporting PCRE, JavaScript, Python, and Golang flavors. It provides instant feedback on matches, capturing groups, and errors as you type, with syntax highlighting and match information displayed in real time. A built-in quick reference explains tokens and quantifiers, while the detailed explanation panel breaks down your regex pattern step by step. Additional features include code generation, regex quizzes, and a community-shared library of expressions.

Screenshots