UUID Generator
Generate UUIDs v1, v4, v7 & NIL
How to Use
Choose UUID version
Select version 4 (random) for most use cases, or version 1 (timestamp-based).
Set quantity
Enter how many UUIDs you need to generate.
Generate
Click Generate to create your unique identifiers.
Copy UUIDs
Copy individual UUIDs or all at once.
Frequently Asked Questions
What is a UUID?
UUID (Universally Unique Identifier) is a 128-bit identifier that is practically guaranteed to be unique across all devices and time. Format: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx.
What is the difference between UUID versions?
UUID v1 uses timestamp and MAC address. UUID v4 uses random numbers (most common). UUID v5 uses namespace and name hashing. Each has different use cases.
Why use UUID instead of auto-increment IDs?
UUIDs can be generated anywhere without coordination, work in distributed systems, don't reveal record counts, and can be created client-side before database insert.
Are UUIDs truly unique?
For UUID v4, the probability of collision is astronomically low (about 1 in 5.3 billion billion). In practice, they can be treated as unique.
Is this generator secure?
Our generator uses crypto.randomUUID() which provides cryptographically strong random values. Safe for security-sensitive applications.
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