Générateur UUID / ID
v4, NanoID, court
À propos de cet outil
Generate UUIDs (Universally Unique Identifiers) - version 4 (random) and version 7 (timestamp-based with random tail). Use them as primary keys in databases, idempotency keys for API requests, file names that can't collide, distributed-system event IDs, and anywhere you need a globally unique value without coordinating with a central server.
Privvert generates UUIDs locally with the browser's secure random source. Bulk-generate up to thousands at a time and copy them all with one click.
Fonctionnalités
- UUID v4 (random) and v7 (time-ordered)
- Bulk generate (1 to thousands)
- Hyphenated standard format or compact (no hyphens)
- Copy all with one click
- Cryptographically random (window.crypto.getRandomValues)
- Browser-only - values never logged
- Free and unlimited
Comment l'utiliser
- Pick version (v4 or v7) and count.
- Click Generate.
- Copy individual values or all at once.
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Questions fréquentes
v4 is fully random - great for unpredictability. v7 is time-ordered (the first part is a Unix millisecond timestamp), which makes database indexes much more efficient because new IDs sort near recent ones. Use v7 for primary keys, v4 when unpredictability matters.
v4 has 122 bits of randomness - collisions are statistically impossible at any human scale (you'd need to generate billions per second for many years to have a meaningful collision risk). v7 is even safer because the timestamp prefix adds entropy.
Yes - they're URL-safe by default. Use the compact (no-hyphens) form if URL length matters.
v1 (MAC address + time) leaks information; v3/v5 are namespace-based hashes. Modern best practice is v4 for randomness or v7 for sortability - those two cover almost all use cases.