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Regex Tester ๐Ÿ”

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What is Regex?

Regex (Regular Expression) is a powerful language for pattern matching and text manipulation. It's a sequence of characters that forms a search pattern, used by developers for validation, searching, and replacing text.

Regex Flags

Flags change how patterns are matched. 'g' (global) finds all matches; 'i' (ignore case) ignores capitalization; 'm' (multiline) treats start/end anchors as per-line rather than per-string.

Frequently Asked Questions

By default, regex quantifiers like * or + are greedy โ€” they match the longest possible string. Adding a ? makes them 'lazy', matching the shortest possible string.
Regex can verify if an input follows the standard email structure (user@domain.com), though a perfect email regex is surprisingly complex due to international standards.

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