Regex, Explained

Build and test text search patterns with real-time matching and plain English explanations. No regex PhD required.

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/ [\w.]+@[\w]+\.[a-z]{2,} / gi
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What Can You Do With Regex?

Regular expressions are powerful text patterns used across all programming languages.

How It Works

1

Type a Pattern

Enter your regex pattern with syntax highlighting and real-time error checking.

2

See Matches Highlighted

Paste your test text and watch matches light up instantly with color coding.

3

Read the Explanation

Every part of your pattern is explained in plain English. No guessing required.

Everything You Need

Real-time Matching

See matches highlighted as you type. Zero delay, zero friction.

Plain English Explanations

Every token in your pattern broken down into readable descriptions.

Pattern Library

20+ ready-to-use patterns for emails, URLs, dates, IPs, and more.

Find & Replace

Test substitution patterns with back-references and see results live.

Share Patterns

Generate shareable URLs to send your regex to teammates instantly.

Quick Reference

Built-in cheat sheet with clickable tokens you can insert directly.

100% Free

Every feature. No limits. No signup. No catch.

Frequently Asked Questions

What is regex?
Regex (regular expressions) is a sequence of characters that defines a search pattern. It is used in virtually every programming language and text editor to find, match, and manipulate text. Think of it as a powerful "find" tool with wildcards and rules.
Is this free to use?
Yes! RegexForge is completely free with no limits. The regex tester, pattern explanations, pattern library, find-and-replace, and unlimited saved patterns are all free. No signup, no catch.
Do I need to know regex already?
Not at all. RegexForge explains every pattern in plain English, includes a pattern library with ready-to-use examples, and provides a quick reference cheat sheet. It is designed to help beginners learn and experts work faster.
Can I save and share my patterns?
Yes. You can save patterns to your browser for later use, and generate shareable URLs that encode your pattern, flags, and test string so anyone can open them and see your exact setup.
Regular Expression
0 matches
/
/ g
Test String
1

Common Regex Use Cases

Form Validation

Data Extraction

Log Parsing

Search & Replace

Match #1