Requirements used
- v4
- Up to 1,000
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Frequently asked questions
Are these UUIDs unique?
Version 4 UUIDs carry 122 random bits from crypto.randomUUID, so a collision is astronomically unlikely in practice.
What is the difference between a UUID and a GUID?
They are the same 128-bit format. GUID is the name used in the Microsoft ecosystem.
Can I use them as database keys?
Yes, but random v4 values index less efficiently than time-ordered ids in large tables. Consider UUID v7 or ULID if insert locality matters.
Are they generated on a server?
No. They are created locally and never leave the page.