UUID v5 generator

Generate a deterministic SHA-1-based UUID v5 locally from a namespace and name

Inputs

Choose a standard namespace or enter a custom namespace UUID, then provide the exact name.

Standard namespace

Generated UUID

The result updates immediately when the namespace or name changes.

v5SHA-1Deterministic

Name normalization

Names are encoded exactly as UTF-8, including whitespace, letter case and empty names. DNS lowercasing, URL canonicalization and Unicode normalization are not automatic. Normalize names according to your target protocol first. Changing the namespace also changes the result

Safety and reproducibility

Results are reproducible, not secret: anyone knowing the namespace and name can recreate them. MD5 and SHA-1 are not suitable for security authentication; do not use these UUIDs as passwords, API keys or session tokens. v3 provides MD5 compatibility; v5 provides SHA-1-based naming

How to use

Choose DNS, URL, OID or X.500, or enter a custom namespace UUID. Enter a name; the result updates immediately and can be copied