What is the UUID Gen?
A UUID (Universally Unique Identifier) is a 128-bit label used for information in computer systems. Version 4 UUIDs are randomly generated and practically guaranteed to be unique across all systems globally.
Key Features
Generate v4 UUIDs
Bulk generation support
Hyphenated or raw formats
Cryptographically secure randomness
How to use the UUID Gen
- Select how many UUIDs you want to generate.
- Toggle hyphens on or off depending on your database constraints.
- Click generate and copy the results.
Examples
Input
Generate 1 UUID (v4)
Output
f47ac10b-58cc-4372-a567-0e02b2c3d479
Common Errors & Troubleshooting
Invalid Format during validation
A standard UUID must contain exactly 32 hex characters and 4 hyphens.
f47ac10b58cc4372a5670e02b2c3d479 (Missing hyphens)
When should you use this tool?
- Assigning primary keys in distributed databases.
- Creating unique session IDs for web users.
- Naming uploaded files uniquely to prevent overwrites.
What's the difference?
UUID v4
Generated using purely random numbers. Standard for modern web apps.
UUID v1
Generated using the computer's MAC address and current time. Considered a privacy risk.
Tool Comparison
| Feature | ByteUtils |
|---|---|
| Generate v4 | |
| Bulk Generation | |
| Crypto.randomUUID API | |
| Server-side tracking | No |
Frequently Asked Questions
Are these UUIDs cryptographically secure?
Yes. This tool utilizes the modern Web Crypto API provided by your browser.
What version of UUID is generated?
Version 4 (v4), which relies entirely on random number generation.
Privacy First
All processing happens directly in your browser. Your data, payloads, and files are never uploaded to our servers or tracked.
Tool Information
- Category: security
- Runs in Browser: Yes
- Requires Login: No
- Mobile Friendly: Yes