Question 1

Are these UUIDs cryptographically secure?

Accepted Answer

Yes. The tool uses the browser's built-in crypto.randomUUID() API, which uses a cryptographically secure pseudorandom number generator (CSPRNG).

Question 2

What is a UUID v4?

Accepted Answer

A version 4 UUID is a 128-bit random identifier formatted as 8-4-4-4-12 hex digits separated by hyphens. The version nibble is always 4 and the variant nibble is 8, 9, a, or b.

Question 3

Can I generate UUIDs in bulk?

Accepted Answer

Yes. Set the count to any number between 1 and 100 and click Generate. Use Copy all or Download to get them all at once.

Question 4

Are the UUIDs unique?

Accepted Answer

Yes with overwhelming probability. The chance of a v4 UUID collision is astronomically small — roughly 1 in 5.3 × 10³⁶ for any two random UUIDs.

UUID 生成器

关于 UUID 生成器的常见问题

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UUID 生成器

关于 UUID 生成器 的常见问题

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关于 UUID 生成器的常见问题