UUID generator
Generate UUIDs in bulk: v4 (random), v7 and v6 (time-sortable), v1, plus nil and max.
Random (most common).
🔒 100% client-side — no data sent
Generate UUIDs instantly, one or many at a time, for unique database identifiers, keys or testing. Pick the version: v4 (random), v7 and v6 (time-sortable, great as database keys), v1 (timestamp-based), plus the nil and max UUIDs. Everything is generated locally in your browser, with no data sent anywhere.
FAQ
Which UUID version should I choose?
v4 (random) fits most cases. For database keys sortable by creation order, prefer v7. v1 and v6 are clock-based; nil and max are special values (all zeros / all Fs).
What is a UUID v4?
A UUID v4 is a 128-bit unique identifier generated randomly, represented as 36 characters (32 hexadecimal digits and 4 hyphens). It is the most common version for creating unique identifiers.
Can two UUIDs be identical?
The probability of a collision between two v4 UUIDs is extremely small: you would need to generate billions of them before a duplicate becomes plausible. They are treated as unique in practice.
Is a UUID truly random?
A v4 UUID uses 122 random bits, generated here through the browser's secure cryptographic API. This provides high-quality randomness suitable for identifiers.
Can I generate multiple UUIDs at once?
Yes, the tool lets you generate one or several UUIDs at once and copy them easily. Everything happens locally in your browser.