Skip to content
ToolsOnDuty - free online tools
Security & Cryptography

UUID v5 Generator

Generate a deterministic namespace UUID (version 5).

Free browser toolRuns in your browserNo sign-up

UUID v5 is deterministic: the same name and namespace always produce the same UUID, computed with SHA-1 in your browser.

100% private - runs entirely in your browser.

Your input, keys and passwords are never uploaded. Want proof? Load this page, then turn off your internet - the tool still works. For an exact check, open your browser's DevTools Network tab and confirm no data is sent when you use it.

About the UUID v5 Generator

Generate a version 5 UUID, which is deterministic: the same name and namespace always produce the same UUID.

Pick a standard namespace (DNS, URL, OID, X.500) or provide your own, then enter a name.

The UUID is computed with SHA-1 in your browser, so nothing is uploaded.

Key features

  • Deterministic, name-based UUIDs
  • Standard DNS, URL, OID and X.500 namespaces
  • Custom namespace support
  • Copy the result instantly

How to use

  1. 1Choose a namespace or enter a custom one.
  2. 2Type the name to hash.
  3. 3Copy the generated UUID.

Examples

DNS namespace
Input: example.com in DNS
Output: cfbff0d1-9375-5685-968c-48ce8b15ae17

The same name and namespace always give this UUID.

Different namespace
Input: example.com in URL
Output: A different UUID

Changing the namespace changes the result.

Frequently asked questions

How is UUID v5 different from v4?
Version 4 is random, while version 5 is deterministic from a namespace and name, so the same inputs always give the same UUID.
What is a namespace?
A namespace is a fixed UUID that scopes your names, so the same name in different namespaces gives different UUIDs.
Is my data uploaded?
No. The UUID is computed entirely in your browser.

Continue your workflow

Open a related tool to prepare your files or refine the finished result.