UUID Generator & Validator
Generate random UUIDs (v4) or time-based UUIDs. Bulk generation, one-click copy, and UUID validation built in.
Generate UUIDs
How to Use This UUID Generator
- Select the UUID version (v4 random is most common)
- Set the count (1-100) for bulk generation
- Click Generate to create UUIDs
- Click Copy on any UUID or Copy All to grab them all
What is a UUID?
A UUID (Universally Unique Identifier) is a 128-bit identifier that is unique across space and time. The most common format is v4, which uses random numbers to generate a UUID that is practically guaranteed to be unique.
UUID Versions
- v1 — Time-based: uses current timestamp and machine identifier
- v4 — Random: uses cryptographically secure random numbers (most popular)
- v5 — Name-based: SHA-1 hash of a namespace and name
- v7 — Unix Epoch time-ordered: newer standard for sortable UUIDs
Frequently Asked Questions
Is my data safe?
Yes. UUIDs are generated using your browser's Web Crypto API. Nothing is sent to any server.
Can two UUIDs be the same?
Theoretically possible but practically impossible. With 122 random bits in a v4 UUID, you would need to generate 2.71 quintillion UUIDs to have a 50% chance of a collision.
UUID vs GUID — what's the difference?
They are the same thing. GUID (Globally Unique Identifier) is Microsoft's term for UUID.