Select the number of UUIDs you want to generate (single or bulk).
Click 'Generate UUID' to create new cryptographically random identifiers.
Click the copy icon to copy individual or bulk UUIDs to your clipboard.
Generate as many new UUID batches as needed with one click.
Key Features & Benefits
Generates RFC 4122 compliant Version 4 UUIDs.
Uses browser crypto.getRandomValues() for cryptographic randomness.
Bulk generation support for database seeding and testing.
Clean, lowercase hyphenated standard formatting.
Frequently Asked Questions
What is a Version 4 UUID?
A Version 4 Universally Unique Identifier (UUID) is a 128-bit label generated using cryptographically strong pseudo-random numbers. Its canonical form has 32 hexadecimal digits separated by hyphens (8-4-4-4-12).
Can two generated UUIDs ever collide?
While theoretically possible, the probability of a duplicate UUID v4 collision is practically zero — approximately 1 in 2.71 quintillion, requiring billions of UUIDs generated every second for decades.
Is it safe to use these UUIDs as database primary keys?
Yes. UUID v4 identifiers are standard for distributed database systems, microservices, and API request IDs where centralized sequence coordination is impractical.