UUID Generator
Generate one or many random UUID v4 strings instantly. Choose between lowercase and uppercase formats. Copy individual UUIDs or all at once. All UUIDs are generated using the browser's crypto API — no server involvement.
Your files stay private
All processing happens directly in your browser using WebAssembly. Your files are never uploaded to any server and never leave your device.
How to Use UUID Generator
- 1
Set how many UUIDs to generate (1-20)
- 2
Choose lowercase or uppercase format
- 3
Click Generate
- 4
Copy individual UUIDs or all at once
Frequently Asked Questions
What is a UUID?
A UUID (Universally Unique Identifier) is a 128-bit label used to uniquely identify objects in software systems. Version 4 UUIDs are randomly generated.
Are these UUIDs truly unique?
UUID v4 uses cryptographic randomness, making the probability of collision astronomically low — effectively unique for all practical purposes.
Features
- Generate 1-20 UUIDs at once
- Lowercase and UPPERCASE formats
- Cryptographically random (crypto.randomUUID)
- One-click copy per UUID or all
- Instant, no server required
Supported Formats
Input
Output
UUIDPrivacy First
All conversions happen in your browser. Nothing is uploaded to our servers. Your files remain completely private.