What is the difference between UUID v1, v4, and v7?

v1 is time-based and includes the machine MAC address. v4 is random and is the most common default. v7 is time-ordered random, which can be better for database indexing because it sorts chronologically.

Are UUID v4 IDs truly unique?

The probability of two random UUID v4s colliding is about 1 in 10^38. In practice, you would need to generate 1 billion UUIDs per second for 85 years before expecting a duplicate.

Can I use these UUIDs in production?

Yes. This tool uses crypto.randomUUID() or a cryptographically secure fallback, making the output suitable for production use.

Generate UUID v4 IDs

Generate UUID v4 identifiers locally for apps and databases.

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WHY THIS TOOL EXISTS

What is a UUID?

UUIDs are 128-bit identifiers built for distributed systems where you need unique values without a central counter. UUID v4 uses random numbers and is the common default for general-purpose IDs.

Benefits: Generate UUID v4 instantly, bulk-generate multiple IDs, copy to clipboard, cryptographically random, works offline.

Best for: Primary keys, session IDs, API tokens, distributed systems, file naming, and item tracking.

Read this before you convert

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