Regex Tester
Test, debug, and analyze Regular Expressions (Regex) in real-time.
About this tool
Regular Expressions (Regex) are a sequence of characters that define a search pattern. In software engineering, Regex is utilized for string matching, input validation (such as verifying email formats), and text manipulation.
This Regex Tester provides an environment to build and test regular expressions. By inputting a Regex pattern alongside sample text, the tool processes the logic and highlights string matches. The application supports standard Regex modifiers (flags) including 'g' (global search) and 'i' (case-insensitive matching). This tool is free to use and requires no registration.
Pattern matching and text analysis are executed locally within the client browser. The Regex logic and sample texts are not transmitted to remote servers.