UUID Generator
Generate random UUID v4 identifiers. Create single or bulk UUIDs with one click.
100% Client-Side
Version 4 (Random)
What is UUID Generator?
A UUID (Universally Unique Identifier) generator creates 128-bit identifiers that are practically guaranteed to be unique across all systems and time. UUIDs are widely used as database primary keys, session tokens, and distributed system identifiers.
How to Use
- Click generate to create one or more UUIDs
- Choose the UUID version (v4 random is most common)
- Copy individual UUIDs or generate them in bulk
- Use the formatted or unformatted (no hyphens) version as needed
Frequently Asked Questions
- What is the difference between UUID v1 and v4?
- UUID v1 is based on timestamp and MAC address (time-ordered but potentially reveals device info). UUID v4 is fully random and the most widely used for general purposes.
- Can two UUIDs ever be the same?
- Theoretically possible but astronomically unlikely. With UUID v4, you'd need to generate about 2.71 quintillion UUIDs to have a 50% chance of a single collision.
- Is a UUID the same as a GUID?
- Yes. GUID (Globally Unique Identifier) is Microsoft's term for the same concept. They follow the same standard (RFC 4122).