RegEx Tester & Debugger

What are Regular Expressions?

Regular expressions (regex) are patterns for finding and transforming text. They're commonly used for validation (like emails), parsing logs, extracting IDs, and performing powerful search/replace operations.

Regex Best Practices

• Keep patterns as specific as possible to avoid false positives.
• Prefer simpler patterns and test against realistic sample text.
• Watch for catastrophic backtracking with nested quantifiers (e.g., (a+)+).