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UUID Generator
Generate RFC-compliant UUIDs (v1, v4, v5), ULIDs, NanoIDs, and CUIDs instantly in your browser. Generate 1 to 100 at a time, format, copy, or download.
⚙️ Generator
1 UUID
Namespace UUID
Name
Click Generate to create UUIDs…
📖 About UUID Types
UUID v4 Most Common
Randomly generated, 128-bit. Best for most use cases — databases, session IDs, resource identifiers.
UUID v1
Time-based + MAC address. Monotonically increasing. Useful when ordering by creation time matters.
UUID v5 Deterministic
SHA-1 hash of a namespace + name. Same inputs always give the same UUID. Good for reproducible IDs.
ULID
Universally Unique Lexicographically Sortable Identifier. 26-char, URL-safe, sortable by time.
NanoID
Compact, URL-safe random ID. Smaller than UUID, customisable length. Popular in modern web apps.
CUID
Collision-resistant, time-prefixed, readable. Good for distributed systems and client-side ID generation.