🧪 Regex Tester

What is a Regular Expression?

A regular expression (or RegExp) is a sequence of characters that specifies a search pattern in text. It's a powerful tool for finding, replacing, and validating strings. Common flags include:

• g - Global search (find all matches, not just the first).
• i - Case-insensitive search.
• m - Multi-line search (^ and $ match start/end of lines, not just the whole string).