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Portfoliotools.

Developer

UUID Generator

Generate UUIDs in bulk using the browser's cryptographic random source rather than Math.random, with formatting options for the shapes different systems expect.

Runs entirely in your browser

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How it works

  1. 01Choose how many you need and the formatting you want.
  2. 02Copy them all at once.

Questions

Are these random enough to use as database keys?
Yes. They come from crypto.randomUUID, which draws on the platform's cryptographic random source. Generators built on Math.random do collide in practice and should never be used for identifiers.
What version are they?
Version 4 — random rather than time-based. If you need sortable identifiers, UUID v7 or ULID are better suited, but v4 is what almost everything expects.
Is there a catch — a limit, a watermark, a sign-up?
None. Because the work happens on your machine rather than a server, there is no per-file cost to recover and therefore nothing to meter. No account, no queue, no watermark.