🎲 RFC 9562 UUID v7 • RFC 4122 UUID v4 • Web Crypto API
Cryptographic UUID v4, v7 & NanoID Studio
Generate batch cryptographically secure unique identifiers. Leverage UUID v7 for high-concurrency database B-tree indexes or compact 21-character NanoIDs.
⚙️ Identifier Parameters
Batch Quantity 10 IDs
Hyphen Separation
Uppercase Letters
Output Export Mode
💡 Why UUID v7 for Databases?
Standard UUID v4 has random distribution, causing severe random I/O and page splits in B-tree database indexes (PostgreSQL, MySQL). UUID v7 starts with a 48-bit UNIX millisecond timestamp, delivering sequential inserts and 4x higher write throughput.
📋 Generated Identifiers
Entropy: 128 bits
Collision probability: < 1 in 10^18
WebCrypto: crypto.getRandomValues