UUID / GUID Generator
Generate random UUIDs (Universally Unique Identifiers) instantly.
How to Use UUID / GUID Generator
- Click the 'Generate' button to create a new random UUID (Version 4).
- Use the bulk generate option to create multiple UUIDs at once — specify the number you need.
- Copy individual UUIDs or the entire batch to your clipboard with one click.
About UUID / GUID Generator
The UUID Generator creates cryptographically random Version 4 UUIDs (Universally Unique Identifiers) that are safe to use as database primary keys, session tokens, file identifiers, and tracking IDs. UUIDs are 128-bit identifiers presented as 32 hexadecimal digits in the format 8-4-4-4-12 (e.g., 550e8400-e29b-41d4-a716-446655440000). Version 4 UUIDs are generated using random or pseudo-random numbers, making collisions virtually impossible — the probability of generating two identical UUIDs is astronomically low. Our generator uses the browser's built-in crypto.getRandomValues() for true cryptographic randomness. Batch generation lets you create multiple UUIDs at once for database seeding, test data, or configuration files.
Frequently Asked Questions
What's the difference between UUID and GUID?
UUID (Universally Unique Identifier) and GUID (Globally Unique Identifier) are essentially the same thing. UUID is the standard term used in most programming contexts, while GUID is the term commonly used in Microsoft technologies.
Are the generated UUIDs truly unique?
Version 4 UUIDs use 122 bits of randomness, giving over 5.3 × 10^36 possible values. The probability of generating a duplicate is approximately 1 in 2.71 quintillion — effectively zero for any practical purpose.
Can I use these UUIDs as database primary keys?
Yes! UUIDs are widely used as primary keys in distributed databases. They allow records to be created independently on different servers without coordination. However, consider that UUID primary keys use more storage than auto-incrementing integers.