Générateur UUID & NanoID
v4 / v7 / NanoID — génération en lot dans le navigateur
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Générateur UUID & NanoID
Cryptographically random identifiers for databases, distributed systems and URLs. Supports UUID v4 (random, RFC 4122), UUID v7 (time-sortable, RFC 9562) and NanoID with a customisable alphabet. Generate up to 1000 IDs at a time.
- UUID v4 — fully random, 122 bits of entropy
- UUID v7 — time-sortable, ideal for primary keys
- NanoID — URL-safe, customisable alphabet
- Batch up to 1000 IDs
- Uses crypto.getRandomValues
- Zero network — works offline
FAQ
When should I use UUID v7 instead of v4?
UUID v7 starts with a 48-bit Unix-millisecond timestamp, so IDs created at similar times sort together. This dramatically improves database B-tree insertion locality.
Is NanoID better than UUID?
Different trade-off: shorter (21 vs 36 chars), URL-safe, similar collision probability. Pick UUID for cross-system standards, NanoID for compact public IDs.