A Universally Unique Identifier — a 128-bit label guaranteed to be unique across time and space.

What version of UUID is generated?

UUID v4 (random) using the browser's crypto.randomUUID().

Are generated UUIDs truly unique?

UUID v4 has 2^122 possible values — the probability of collision is negligible.

GUID (Globally Unique Identifier) is Microsoft's name for UUID — they are the same format.

Yes, toggle between uppercase and lowercase output.

free

Generate random UUIDs (v4) and NIL UUIDs. Generate up to 100 UUIDs at once.

Number of UUIDs

UUID v4

834d9853-06ba-412e-b475-29b48bb47f88

Select how many UUIDs to generate (1-100).

Click Generate to create random UUIDs.

Copy individual UUIDs or all at once.

Generate MD5, SHA-1, SHA-256, SHA-512 hashes from text or files. Browser-based, private.

Generate strong, random, and secure passwords instantly. Customize length and character types.

Encode and decode Base64 strings online. Also supports file to Base64 encoding for data URIs.