UUID / GUID Generator
Generate cryptographically random Version 4 UUIDs (Universally Unique Identifiers). Uses the browser's native crypto.randomUUID() API.
Single UUID
Bulk Generate
What is a UUID / GUID?
A UUID (Universally Unique Identifier), also known as a GUID (Globally Unique Identifier), is a 128-bit label used to uniquely identify objects in software. It's typically represented as 32 hexadecimal digits displayed in five groups separated by hyphens: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx.
Version 4 UUIDs
Version 4 UUIDs are generated using random or pseudo-random numbers. With 122 random bits, the probability of generating two identical UUIDs is approximately 1 in 5.3 × 10³⁶ — for all practical purposes, every UUID is unique.
Common use cases
- Primary keys in databases (avoiding sequential ID exposure)
- Identifying resources in REST APIs
- Tracking sessions, events, or transactions
- Naming files or objects uniquely without coordination