UUID v5 Generator | Namespace-Based Deterministic UUID Tool

UUID v5 generator creates deterministic namespace-based UUIDs from a SHA-1 hash of a name and namespace, matching Python, Java, and .NET output exactly. Free, in your browser.

Also known as: uuid v5 generator · uuid version 5 online · namespace uuid generator · deterministic uuid generator · sha1 based uuid tool · uuid v5 online free · generate uuid from string

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Name Input

Namespace

6ba7b810-9dad-11d1-80b4-00c04fd430c8

Names (one per line)

The same namespace and name always produce the same UUID, so this is safe to use as a stable cache key or resource ID derived from a URL, hostname, or other string.

UUID v5 Output

Enter one or more names, pick a namespace, and press Generate UUID v5

About UUID v5 Generator

Generate deterministic, name-based UUID version 5 values from a namespace and a name. Unlike random UUID v4, the same namespace and name always produce the exact same UUID, matching Python's uuid.uuid5, Java, .NET, and every other RFC 4122 implementation byte for byte.

Key Features

Built-in DNS, URL, OID, and X.500 namespaces plus a custom namespace UUID field
Batch mode generates one UUID per line for a whole list of names at once
Runs the real SHA-1 algorithm via the browser's Web Crypto API, verified against Python's uuid.uuid5 output

Use Cases

Derive a stable, repeatable ID for a URL or hostname to use as a cache key or database primary key
Convert legacy string identifiers into UUIDs without a lookup table, since the conversion is always reproducible
Generate consistent test fixture IDs across services written in different languages

Related Keywords

uuid v5 generator

uuid version 5 online

namespace uuid generator

deterministic uuid generator

sha1 based uuid

generate uuid from string

python uuid5 equivalent

name based uuid

Client-side only

The SHA-1 hash runs in your browser via the Web Crypto API. Names and namespaces are never sent anywhere.

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Frequently asked questions

What is UUID v5 Generator used for?

UUID v5 generator creates deterministic namespace-based UUIDs from a SHA-1 hash of a name and namespace, matching Python, Java, and .NET output exactly. Free, in your browser.

Is UUID v5 Generator free to use?

Yes. UUID v5 Generator is completely free with no usage limits, and there is no paid tier required to use it.

Do I need an account to use UUID v5 Generator?

No. UUID v5 Generator works immediately in your browser with no signup, login, or email address required.

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