Regular Expression Tester

What is Regex Tester?

A Regular Expression (Regex) Tester is a tool that helps you test and debug regular expressions. It allows you to write a pattern, test it against sample text, and see all matches in real-time. You can also use it to perform text replacements using regex patterns.

Common Use Cases

  • Validate text patterns (emails, phone numbers, etc.)
  • Extract specific data from text
  • Find and replace text patterns
  • Clean and format text data
  • Parse structured text
  • Debug regex patterns

How to Use

  1. Enter your regular expression pattern
  2. Select regex flags (i, m, g, s) as needed
  3. Enter the text you want to test against
  4. Click "Test Match" to find matches
  5. Optionally enter replacement text
  6. Click "Replace" to perform text replacement