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UUID v4 (RFC 4122)
128-bit random identifiers. Example: 550e8400-e29b-41d4-a716-446655440000
Perfect for: Unique user IDs, transaction IDs, database keys
Click "Generate" to create your keys
Quick Tips
Choose the key style based on readability, interoperability, and entropy needs.
What is UUID?
Universally Unique Identifiers are 128-bit numbers represented as 32 hex characters with hyphens. Perfect for distributed systems and databases.
What is CUID?
Collision-resistant IDs combining timestamp and random entropy. Optimized for databases and great for pagination. More readable than UUIDs.
What are Hash Keys?
Cryptographic hashes using SHA256, SHA512, or MD5. Suitable for API keys, security tokens, and key derivation functions.
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