Regex Playground Visual
Learn regular expressions visually and interactively. See how patterns come to life step by step with animations that make regex easy and fun to understand.
🎓 Start your adventure
From zero to regex hero. Each lesson includes interactive examples and explanatory animations.
First Steps with Regex
Learn the basics of regular expressions with simple and fun examples.
Character Classes
Learn to use ranges, groups and predefined classes like [a-z], \d, \w and \s to make more flexible patterns.
Quantifiers - The Power of Repetition
Master +, *, ?, {n}, {n,m} to create dynamic patterns that adapt to different amounts of characters.
Groups and Capture - Ninja Level Regex
Unlock the advanced power of capture, references and lookahead/lookbehind to create professional patterns.
Real World Applications
Learn useful regex patterns for common validations: emails, URLs, phones, dates and more.
Flags and Modifiers
Master regex flags to control how your patterns behave: global searches, case-insensitive matching, multiline mode and more.
Dangerous Regex - Avoiding Pitfalls
Learn to identify and avoid regex that can break applications. Discover the dangers of catastrophic backtracking, ReDoS, and how to write safe and efficient patterns.
Performance & Optimization - Fast Regex
Learn to write efficient regex, understand how the internal engine works, and when to use alternatives. Master optimization techniques to improve your application performance.