Database keys
Prefer v7 for primary keys in large tables.
UUID / GUID Generator
Create unique identifiers for databases, APIs and test data. Generate random v4 UUIDs or time-ordered v7 UUIDs, one at a time or a thousand at once, in the format your system expects.
- 100% free
- No sign-up
- Runs in your browser
How to use
How to use the UUID Generator
- Choose v4 or v7.
- Set how many you need, up to 1,000.
- Pick a format, such as uppercase or braces for .NET GUIDs.
- Copy or download the list.
Private by design. UUIDs are generated by your browser's secure random number generator. Nothing is sent or stored.
About this tool
UUID v4 vs v7
A UUID is a 128-bit identifier written as 32 hexadecimal characters in five groups. Version 4 UUIDs are almost entirely random, which makes collisions practically impossible and reveals nothing about when or where they were created.
Version 7, standardised in RFC 9562, starts with a timestamp, so new IDs sort in creation order. That makes them friendlier to database indexes than random v4 IDs, which scatter new rows across the index. Both use your browser's cryptographically secure random generator.
Good to know
Choosing and using UUIDs
Public identifiers
v4 reveals nothing about timing, which suits public links.
GUIDs in .NET
A GUID is Microsoft's name for a UUID. Use the braces format if required.
Not for secrets
Use the password generator for secret tokens, not UUIDs.
FAQ
UUID Generator FAQs
Are these UUIDs truly unique?
The chance of a collision with v4 is so small it can be ignored for practical purposes.
What is the difference between a UUID and a GUID?
They are the same thing; GUID is the name Microsoft uses.
Can UUIDs be guessed?
v4 UUIDs are random and hard to guess, but they are identifiers, not passwords.
Is anything stored?
No. UUIDs are generated in your browser and not saved.
Need extra development capacity?
Hire dedicated developers from iCreativez who work as part of your team.