UUID v4 Generator
Cryptographically random UUIDs (version 4) — single or in bulk, generated on your device.
Quick answer: Free UUID v4 generator: create one or bulk-generate hundreds of cryptographically random unique identifiers. Copy individually or all at once.
How to use
- Open this page on any device — no signup needed.
- Fill in the fields above.
- Get your result instantly — nothing is uploaded.
About this tool
A UUID v4 is a 122-bit random identifier formatted as 8-4-4-4-12 hex digits — collisions are astronomically improbable (~1 in 10^36 for a handful). Used for database keys, API request IDs, filenames and distributed systems. This generator uses crypto.randomUUID (or an equivalent fallback), never sequential counters.
FAQ
Can UUIDs collide?
Are they secure as secrets?
Uppercase or braces?
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The complete uuid generator guide
Prefer the long version — a worked example, the mistakes people actually make, and answers to real questions? The blog guide Uuid Generator — Complete Guide, Mistakes & FAQ covers all of it step by step.
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