UUID Generator
FreeGenerate UUID v1, v4, v7 with bulk generation and format options
uuidguidgenerateunique
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How it works
1
Generate
Click Generate to create a new random v4 UUID instantly.
2
Configure
Set how many UUIDs to generate at once and choose uppercase or lowercase formatting.
3
Copy
Copy a single UUID or all generated UUIDs to your clipboard.
Frequently asked questions
Are the UUIDs truly random?+
Yes. The generator uses your browser's Web Crypto API for cryptographically secure random values. Everything runs in your browser and generated UUIDs are never stored or transmitted.
What is a v4 UUID?+
A v4 UUID is a 128-bit identifier generated from random numbers. It follows the format xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx, where 4 indicates version 4 and y is a variant indicator.
Can two v4 UUIDs ever collide?+
Theoretically yes, but the probability is astronomically low. With 122 random bits, you would need to generate about 2.7 quintillion UUIDs to have a 50% chance of a single collision.
Can I generate multiple UUIDs at once?+
Yes. Set the quantity and click Generate to create a batch of UUIDs. All are generated client-side in your browser and can be copied together.