🔍 Regex Tester

What is Regex Tester?

Regex Tester is a powerful debugging tool for developers working with Regular Expressions. It allows you to write a regex pattern and instantly test it against sample text, highlighting all matches, capture groups, and providing an explanation of the syntax.

How to Use Regex Tester

1. Enter your Regular Expression pattern (e.g., ^[a-z]+$)
2. Toggle the necessary flags (g, i, m)
3. Paste your target test string into the text area
4. Review the highlighted matches and capture groups below

Why Use Our Regex Tester?

• Test and debug complex Regular Expressions in real-time
• Highlights exact matches and capture groups visually
• Supports common flags (global, case-insensitive, multiline)
• Runs safely in the browser without server round-trips

Common Use Cases

• Writing a regex pattern to validate email addresses in a form
• Extracting specific data points (like phone numbers) from a massive text log
• Debugging a complex string replacement function in your code

Frequently Asked Questions

• Which regex engine does it use?▾
  It uses the JavaScript (ECMAScript) regular expression engine built into your browser.