About this uuid generator
Create one or a batch of version 4 UUIDs for development, fixtures, and identifiers. Choose a quantity between one and one hundred, then generate a fresh batch. Each identifier uses the browser’s cryptographically secure random UUID API. Results are listed one per line for copying into a file or a development tool. There is no account, remote request, or shared history of the identifiers you generate.
How the uuid generator works
The browser crypto.randomUUID API produces random version 4 UUIDs with standard version and variant bits.
UUID Generator examples
Quantity 1
One UUID in the pattern xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx
Quantity 3
Three independently generated UUIDs, one per line
Limitations & privacy
Requires a secure context such as HTTPS or localhost. Random identifiers have extremely low but nonzero collision probability. UUIDs are not passwords or access tokens.
Inputs and results stay in this browser. Only tool identifiers are stored for your recently used tools. You can clear that history from the directory.
UUID Generator: frequently asked questions
Are these version 4 UUIDs?
Yes, they are cryptographically random v4 UUIDs.
Can I generate the same UUID again?
There is no seed or deterministic mode.
How many can I generate at once?
Between 1 and 100. Use another run for a fresh batch.
Updated September 20, 2026