How to use UUID Generator
- 1
Open the UUID Generator
Go to tools.slaytic.com and open the UUID Generator. No sign-up or account required.
- 2
Choose how many
Enter how many UUIDs you need, from 1 to 100.
- 3
Copy or download
Click Generate, then Copy all to your clipboard or Download as a text file.
How this works in your browser
This tool uses crypto.randomUUID(), the Web Crypto API built into every modern browser, which generates a version-4 UUID from a cryptographically secure random source rather than a predictable pseudo-random one. No library is loaded and nothing is transmitted; each UUID is created locally the instant you click Generate.
UUID Generator vs. traditional online converters
| Feature | UUID Generator (in-browser) | Traditional online converters |
|---|---|---|
| File upload required | No - never leaves your device | Yes - file is sent to a server |
| Processing queue | None - starts instantly | Often, especially at peak times |
| Watermark on output | Never | Common on free plans |
| Usage limits | None - free, unlimited use | Often capped per day or file size |
| Works offline once loaded | Yes, for most tools | No - requires a live connection |
| Account required | No | Often, for anything beyond a trial |
Who uses UUID Generator
Backend and database developers
Generate primary keys or unique identifiers for test data, seed scripts, or a new database schema.
API testing
Quickly grab a batch of unique IDs to use as request payloads or mock data.
Anyone needing a unique filename or token
Generate a single UUID on the spot without opening a terminal or writing a one-line script.
Frequently asked questions
Is this UUID generator free?
Yes, completely free with no limit on how many UUIDs you generate.
Are these UUIDs guaranteed to be unique?
Version-4 UUIDs use 122 random bits, making collisions astronomically unlikely in practice, the same standard used by most databases and APIs.
Can I generate more than one at a time?
Yes, choose how many UUIDs to generate in a single batch, up to 100 at once.
How do I copy them all at once?
Click "Copy all" to copy every generated UUID to your clipboard in one go, or use Download to save them as a text file.
What generates the randomness?
Your browser’s built-in cryptographically secure random number generator (crypto.randomUUID).