UUID Generator
Generate secure, random UUIDs (v4) for your applications
Frequently Asked Questions
What is a UUID/GUID?
A Universally Unique Identifier is a 128-bit number used to uniquely identify information in computer systems without a central coordinator.
Which version of UUID do you generate?
We primarily generate UUID v4, which is based on high-entropy random numbers and is the most common version used in modern apps.
How likely is a UUID collision?
Extremely unlikely. The probability of two UUID v4 values being the same is so low that it's practically impossible in any realistic scenario.
Can I generate multiple UUIDs at once?
Yes, you can specify if you want one or a bulk list (e.g., 50 or 100) of unique IDs for your database or testing.
What is the difference between UUID and GUID?
They are effectively the same. GUID is Microsoft's term for the standard implementation of a UUID.
Are the UUIDs generated on your server?
No. They are generated locally in your browser using a cryptographically secure random number generator (CSPRNG).
Can I get the UUIDs in uppercase or lowercase?
Yes, our tool allows you to toggle the capitalization and whether or not to include the hyphens.
What is the format of a UUID v4?
It's 32 hexadecimal characters displayed in five groups: `8-4-4-4-12` (e.g., `550e8400-e29b-41d4-a716-446655440000`).
Is it safe to use these as database primary keys?
Yes, UUIDs are excellent for primary keys, especially in distributed systems where you want to avoid sequential ID clashes.
Is there a fee for generating these IDs?
No. All our developer utilities are free of charge and require no registration.