Regex Tester

Test regular expressions with live match results.

A regular expression (regex) is a sequence of characters that defines a search pattern. Regex is used in nearly every programming language for validating input, searching text, extracting data, and replacing strings. Testing regex patterns from memory is error-prone — our live regex tester shows you exactly which parts of your test string match your pattern in real time, with a built-in quick reference cheat sheet.

How to use:

• 1. Enter your regex pattern in the Pattern field
• 2. Add flags in the flags field (g for global, i for case-insensitive, m for multiline)
• 3. Type or paste your test string
• 4. Matches are highlighted and listed instantly