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UUID Generator

Best free UUID generator: v4, v7, bulk generation

Most UUID generator tools produce a single v4 UUID. MyDevTools UUID Generator lets you choose the version (v4, v7, ULID), generate in bulk, and stay inside a broader developer toolkit for API keys, hashing, QR codes, and other generator workflows.

Generate UUIDs

UUID v4 vs v7: which to generate

UUID v4 is fully random and works everywhere. UUID v7 is time-ordered, which makes it better for database primary keys where insert order matters for index performance.

  • UUID v4: stateless, random, maximum compatibility with existing systems.
  • UUID v7: time-ordered, better B-tree locality, recommended for new database schemas.
  • ULID: shorter, URL-safe, lexicographically sortable alternative to UUID.

Why use a toolkit instead of a single-purpose generator

After generating UUIDs you often need to build a request body, format JSON, or generate an API key — all in the same session.

  • Generate UUIDs and API keys from the same generator section.
  • Paste generated IDs into the API client or JSON formatter without switching tools.
  • Use mock data generator when you need multiple IDs alongside other test fields.

Verdict

Any UUID generator produces valid v4 UUIDs. Choose one that integrates into your broader workflow.

  • Best single v4: any basic generator.
  • Best version choice + bulk + context: MyDevTools.
  • Best all-in-one toolkit: MyDevTools.

Common comparison questions

Is it safe to use a UUID generator?

UUID v4 generators use cryptographically random bytes and do not transmit anything sensitive. MyDevTools UUID Generator runs locally with no server round-trip.

Can I generate UUIDs in bulk?

Yes. MyDevTools UUID Generator lets you set a count and generate multiple UUIDs at once, ready to copy as a list.