Which UUID version is generated?
UUID v4 (random), using browser cryptographic randomness (crypto.getRandomValues) for uniqueness and unpredictability.
How do I generate multiple UUIDs?
Set the count to 1-100, generate, and get multiple lines with one-click copy-all — perfect for batch test data.
UUID vs GUID?
Essentially equivalent. GUID is Microsoft's implementation with the same format; interchangeable.
Is generation safe?
Safe — cryptographic randomness, generated locally, no network or upload, suitable for security-sensitive use.
What is it best for?
Database primary keys, API request IDs, session identifiers, message IDs and test data generation.
Are there limits on free use?
No. Free, no registration, unlimited, with batch support.
Can I generate uppercase?
Yes — toggle Uppercase for systems that require it.
Will UUIDs collide?
v4 collision odds are ~1 in 2^122 — practically never for real use.