About this tool
A UUID (Universally Unique Identifier) is a 128-bit value used to identify records, sessions, files and API resources without collisions. This generator creates cryptographically random version 4 UUIDs following the RFC-4122 standard, one at a time or in bulk, ready to copy into your database, code or config. Generation is instant and fully local.
How to use
- 1Choose how many UUIDs you need.
- 2Click Generate.
- 3Copy one UUID or the whole list.
Benefits
- Standards-compliant RFC-4122 v4.
- Generate up to 100 at once.
- Cryptographically random and collision-safe.
When to use a UUID
Practical example
A UUID can identify a draft, upload or database record without coordinating a single numeric counter. Copy the exact value, including hyphens, when another system expects the standard form.
Interpreting the result
Version 4 UUIDs are random identifiers designed to make accidental collisions extremely unlikely. They are useful identifiers, but their randomness does not make them secret.
Limits and common mistakes
Do not use a UUID as a password, authorization token or proof of ownership. Applications should still enforce authentication, authorization and database uniqueness constraints.
Detailed guides for this tool
Learn the underlying concepts, worked examples and common mistakes before relying on the result.
Frequently asked questions
Are these UUIDs truly unique?+
Version 4 UUIDs use random data with an astronomically low collision chance — safe for practical use.
What is version 4?+
It is the random UUID variant, the most common type used in software today.