UUID v5 Generator

Generate deterministic name-based UUIDs (v5, SHA-1) from names and a namespace.

Namespace: Custom namespace UUID:

Names (one per line)

Runs locally in your browser. Your input is not uploaded.

UUID v5

How to Use

1
Pick the namespace
DNS, URL, OID, X.500, or a custom namespace UUID.
2
Enter names
One per line — e.g. hostnames under the DNS namespace.
3
Copy the UUIDs
The same name + namespace always yields the same UUID.

Frequently Asked Questions

: A name-based UUID computed by SHA-1 hashing a namespace UUID plus a name — the same inputs always produce the same UUID, unlike random v4s. Perfect for stable IDs derived from external keys.

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