Regex Playground

Master regex with live matching, 15+ built-in patterns, and instant explanations. The essential tool for developers who write regular expressions.

Regex Playground is a powerful yet intuitive tool designed for developers, data scientists, and anyone working with text patterns. Whether you're validating emails, parsing logs, or extracting data, test your regular expressions instantly with live syntax highlighting and detailed match analysis.

KEY FEATURES

Real-Time Pattern Matching

• Type your regex and see matches highlighted instantly in your test text. No more guessing — know immediately if your pattern works.

Visual Match Analysis

• Tap any match to inspect capture groups, match ranges, and see whether you've achieved a full or partial match. Perfect for debugging complex patterns.

Pattern Explanation Engine

• New to regex? Toggle the explanation view to see a color-coded breakdown of every token in your pattern. Learn what ^, \d, (?:...), and lookahead assertions actually do.

Built-In Pattern Library

• Jump-start your workflow with 15+ production-ready patterns covering emails, phone numbers, URLs, dates, credit cards, passwords, IP addresses, and HTML tags. Save your own custom patterns and organize them by category.

Regex Flags Support

• Enable Case Insensitive, Multiline, Dot All, and Extended modes to test patterns against real-world text formats.

Test Case Suite

• Save reusable test cases with expected outcomes. Run your pattern against your entire test suite and see pass/fail results with a visual progress indicator. Essential for regression testing regex patterns.

Smart History

• Your recent patterns are automatically saved so you can iterate quickly without retyping. Favorite patterns you use daily.

DESIGNED FOR DEVELOPERS

• Clean, distraction-free interface optimized for focused work
• Monospace fonts for pattern readability
• Dark mode support
• No account required — all data stored locally
• Works offline completely

WHO IT'S FOR

• iOS/macOS developers parsing text data
• Backend engineers validating API inputs
• Data analysts cleaning datasets
• Students learning regular expressions
• QA engineers writing test validations

Stop switching between browser tabs and IDEs. Build better regex patterns faster with Regex Playground.