Test and validate regular expressions

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Our Regular Expression Tester is a free online tool that helps you build, test, and debug regular expressions in real-time. With instant visual feedback and match highlighting, this powerful utility makes working with regex patterns faster and more intuitive.

What are Regular Expressions?

Regular expressions (regex) are powerful sequences of characters that define search patterns. They're used for string matching, validation, extraction, and replacement operations in programming, text editing, and data processing. Regex patterns can match anything from simple character sequences to complex patterns with wildcards, quantifiers, and special character classes.

Key Features

• Real-time Testing - See matches highlighted as you type your pattern.
• Pattern Explanation - Understand what each part of your regex is doing.
• Match Information - View detailed information about each match found.
• RegEx Options - Toggle case sensitivity, global matching, and multiline modes.
• Syntax Highlighting - Easily identify different components of your regex pattern.

Why Use a RegEx Tester?

Regular expressions are incredibly powerful but can be difficult to write and debug correctly. Our RegEx tester helps developers and text processing professionals by:

• Providing immediate visual feedback on pattern matches
• Allowing you to refine patterns iteratively until they match exactly what you need
• Making it easier to understand complex patterns through visualization
• Testing patterns against your actual data before implementing them in code

Common Uses

• Form Validation - Test patterns for validating email addresses, phone numbers, and more.
• Data Extraction - Develop patterns to extract specific information from text.
• Text Replacement - Create and test search-and-replace patterns.
• Data Cleaning - Build patterns to identify and remove unwanted content.
• Learning RegEx - Practice and improve your regular expression skills.