UUID Generator
Generate random UUID v4 identifiers, one or in bulk.
About the UUID Generator
A UUID (Universally Unique Identifier) is a 128-bit value used as a database key, request ID or file name without central coordination. Version 4 UUIDs are generated from random numbers.
This UUID v4 generator uses crypto.randomUUID() in your browser. Generate one or many identifiers, in lowercase or uppercase, with or without hyphens.
How to use it
- Choose how many UUIDs you need.
- Click Generate.
- Copy the list.
Frequently asked questions
What is a UUID v4?
A 36-character identifier such as 123e4567-e89b-42d3-a456-426614174000 where 122 bits are random.
Can two UUIDs collide?
Theoretically yes, practically no: you would need to generate billions per second for decades to have a meaningful collision chance.
UUID vs GUID?
They are the same thing; GUID is the term used by Microsoft.
Is it secure for tokens?
v4 UUIDs are unpredictable, but for session tokens or secrets prefer a dedicated random token generator.