Build Complex Regex Patterns with Ease

Our Regex Builder helps you create powerful regular expressions without memorizing complex syntax. Select from our library of pre-defined snippets, combine them, and see real-time results with detailed explanations.

Regex Snippets

Select from common regex patterns to build your expression

Character Classes

Digit (0-9)

Word character

Whitespace

Any character

Quantifiers

0 or more

1 or more

0 or 1

{n}

Exactly n

Anchors

Start of string

End of string

Word boundary

Not word boundary

Groups & Ranges

[abc]

Character set

(abc)

Capture group

[a-z]

Lowercase letters

[A-Z]

Uppercase letters

Regex Builder

Your Regex Pattern

Copied!

Select snippets from the left panel to build your pattern

Test String

Test Results

Enter a test string and see matches here

Pattern Explanation

As you build your regex pattern, a detailed explanation will appear here.

Why Use Our Regex Builder?

Save Time

Build complex regex patterns in minutes instead of hours with our intuitive snippet system.

Learn As You Build

Each snippet comes with an explanation, helping you understand regex concepts.

Test Instantly

See matches in real-time as you build your pattern and test with your own strings.

Frequently Asked Questions

What is a regular expression (regex)?

A regular expression is a sequence of characters that defines a search pattern. It's used for string matching, validation, and text manipulation in programming.

Is this tool completely free?

Yes, our Regex Builder is 100% free to use with no limitations. We believe in providing powerful tools to the developer community.

Do I need to create an account?

No account is required! This tool works entirely in your browser with no signup needed.

Can I save my regex patterns?

Your patterns are saved automatically in your browser's local storage. You can also copy patterns to use in your code.