A UUID (or GUID) is a 128-bit number used to identify data in computer systems. Version 4 UUIDs are completely random, meaning the chance of generating the same ID twice is astronomically low.
v4 is the most common standard for database primary keys because it doesn't require a central registry to ensure uniqueness. You can generate them offline and be confident they won't collide.
Standard 8-4-4-4-12 hex string: xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx
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Generate Random UUIDs
Create Version 4 UUIDs (Universally Unique Identifiers) instantly. Generate batches of up to 100 unique IDs for your database. Fast, free, and private.
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About Generate Random UUIDs
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1
Count
Select how many IDs you need (e.g., 10).
2
Generate
Click to create the batch.
3
Copy
Copy one or all IDs to your clipboard.
Key Features
Bulk Generate
Create up to 500 UUIDs at once.
RFC 4122 Compliant
Generates valid standard v4 UUIDs.
Cryptographically Secure
Uses CSPRNG for true randomness.
No Collision
Statistical guarantee of uniqueness.
Frequently Asked Questions
The probability of a collision is so low (1 in 2^122) that it is well impossible in human timescales.
Yes, we use the browser's crypto.getRandomValues() which is suitable for security contexts.
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