Which UUID version is this?

Version 4 (random). It is not a time-based v1 or a name-based v5 generator.

Are IDs stored on the server?

No. Generation is local. Copy what you need.

Is this unique enough for production keys?

v4 collision risk is negligible for typical app volumes. Your database uniqueness constraint is still the source of truth.

Why this tool stays in the browser

Mint UUID v4 values in the tab for fixtures, local primary keys, and correlation IDs you do not want a hosted generator to log. Randomness comes from Web Crypto. Dummy data and JWT generator sit nearby if the next step is a document or a token, not just an id.

FAQ

Which UUID version is this?: Version 4 (random). It is not a time-based v1 or a name-based v5 generator.
Are IDs stored on the server?: No. Generation is local. Copy what you need.
Is this unique enough for production keys?: v4 collision risk is negligible for typical app volumes. Your database uniqueness constraint is still the source of truth.

UUID Generator

Generate universally unique identifiers (UUIDs) in multiple versions with customizable formatting options.

UUID Version

Random UUID - most commonly used

Quantity5

1100

Format

UppercaseWith Dashes

No UUIDs generated yet

Click "Generate UUIDs" to create unique identifiers