Regex Tester Online - Test Regular Expressions

What This Tool Does

• Tests regex patterns against sample text in real-time
• Highlights all matches and capturing groups
• Explains regex syntax and pattern meaning
• Supports regex flags (global, case-insensitive, multiline)
• Provides regex examples and common patterns

How to Use

1. 1

   Enter regex pattern

   Write your regular expression in the pattern field

2. 2

   Add test text

   Paste sample text you want to match against

3. 3

   Set flags

   Enable global, case-insensitive, or multiline flags as needed

4. 4

   View matches

   See highlighted matches and capturing groups instantly

How it works

Use Cases

• Validating email address and phone number formats
• Extracting data from logs or text files
• Testing input validation patterns for forms
• Parsing structured text data
• Learning regex syntax with live feedback

Frequently Asked Questions