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UUID Generator
Generate UUID v4 identifiers instantly. Create single or bulk UUIDs with one-click copy for your projects.
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Frequently asked questions
A UUID (Universally Unique Identifier) is a 128-bit identifier that is practically guaranteed to be unique across all systems. UUID v4 uses random numbers, making collisions extremely unlikely.
Yes — they use your browser's crypto.randomUUID() or crypto.getRandomValues() APIs, which provide cryptographically secure random numbers.
You can generate UUIDs in lowercase or uppercase, and with or without hyphens. Standard format is lowercase with hyphens: xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx.