UUID Generator — Bulk v4 UUIDs
Generate 1-100 v4 UUIDs at once. Uses crypto.randomUUID for true randomness. Copy individually or all at once.
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Create random v4 UUIDs one at a time or in bulk and copy them instantly — ideal for database primary keys, idempotency keys, test fixtures and correlation IDs.
Why v4
A v4 UUID is 122 bits of randomness, so collisions are astronomically unlikely — you can generate them anywhere, client or server, without coordinating. They’re produced in your browser with the crypto API, so they’re genuinely random and never sent anywhere.
How to use the UUID Generator
Takes about a minute. No signup, no download, your data stays in your browser.
- 1Open the tool. Scroll up to the UUID Generator above — it loads instantly in your browser, no install needed.
- 2Enter your values. The fields come pre-filled with realistic defaults so you can see how it works — replace them with your own numbers.
- 3Read the result. The output updates instantly. Copy or share it — nothing is uploaded to a server, everything stays on your device.
Frequently asked questions
Common questions about the UUID Generator.
How do I generate a UUID?
Click generate for a random v4 UUID — make as many as you need and copy them.
What is a UUID v4?
A 128-bit random identifier (often used for database keys) that’s practically guaranteed to be unique.
Are the UUIDs truly random?
Yes — they’re generated in your browser using the crypto API.
Can I generate many at once?
Yes — bulk-generate a list for seeding or testing.
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