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UUID Generator Pro

Generate UUID v4 and v7 identifiers instantly. Bulk generate, copy, and download.

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Why Use a UUID Generator?

UUIDs are essential for database primary keys, API resource identifiers, session tokens, and distributed systems where unique identifiers must be generated without coordination. UUID v7 with timestamp ordering is increasingly preferred for modern database systems.

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Frequently Asked Questions

What is a UUID?

A UUID (Universally Unique Identifier) is a 128-bit identifier standardized by RFC 4122. It's used to uniquely identify information in computer systems. The probability of duplication is extremely low.

What is the difference between UUID v4 and v7?

UUID v4 is randomly generated. UUID v7 includes a Unix timestamp prefix, making them time-ordered and more efficient for database indexing.

Are these truly random?

UUID v4 uses crypto.getRandomValues() for cryptographically strong random values. UUID v7 embeds the current timestamp with random entropy.