About UUID Generator
This tool generates Universally Unique Identifiers (UUIDs) that comply with RFC 4122 — the standard used across databases, APIs, and distributed systems to identify records without collision. Generate a single UUID or thousands in bulk, choose between version 1 (timestamp-based), version 4 (random), or version 5 (namespace-based), and everything is computed locally in your browser. No UUID you generate is ever sent to a server.
Understanding UUID Versions
UUID v1 is generated from the current timestamp combined with a random node identifier, making each value roughly sortable by creation time. UUID v4 is generated from cryptographically secure random bytes, making it the most common choice for general-purpose unique IDs since it requires no coordination or shared state. UUID v5 is deterministic — it's derived by hashing a namespace UUID together with a name using SHA-1, so the same namespace and name will always produce the same UUID, which is useful when you need a stable identifier for something that already has a name, like a domain or file path.
Send Feedback
For any questions, bug reports, or feature requests, please drop your comments below.