UUID Generator
Generate v4 UUIDs in bulk — perfect for database IDs.
What this tool does
A UUID (universally unique identifier) is a 128-bit value that's practically guaranteed to be unique. Developers use them as primary keys, session IDs, file names, and more. This tool generates RFC 4122 v4 UUIDs — the most common kind — one at a time or in batches.
Why it matters
UUID Generator saves you time and removes guesswork from everyday qr & utility work. RFC 4122 v4 compliant — and because everything runs in your browser, your data stays private and results are instant.
- RFC 4122 v4 compliant
- Bulk generation
- No collisions — chance is astronomically low
How to use
- Pick how many UUIDs you need.
- Click Generate.
- Copy individual UUIDs or download as a text file.
Example output
b3f1c2a4-9d8e-4f6a-bc12-7a5e9d0f1234 e2a14b76-1c3d-4f80-9b2a-55c8d6a17e90
Real-world use cases
- • Database primary keys
- • Distributed systems
- • Session tokens
Tips & best practices
- • v4 UUIDs are random; v7 are time-ordered (better for DB indexes)
- • Never use sequential IDs for public URLs
- • UUIDs are 36 characters with hyphens
Frequently asked questions
Are UUIDs really unique?
Collision probability is so low it's considered effectively zero in practice.
Should I use v4 or v7?
v4 for general use; v7 if you want time-sortable IDs.
Can I shorten a UUID?
Yes, with base62 encoding — but you lose some entropy in the process.
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