How to Generate UUID Online
Generate UUID v4 instantly in your browser. Bulk generate, copy to clipboard, and use in your code. Free UUID/GUID generator with no signup.
Open UUID Generator →Step-by-Step Guide
1
Open the generator
Navigate to the UUID Generator tool. A fresh UUID v4 is generated automatically when the page loads.
2
Generate UUIDs
Click "Generate" to create a new UUID. Need multiple? Set the quantity (up to 100) and generate them all at once.
3
Choose your format
Select standard format (with hyphens), compact (no hyphens), or uppercase. Pick what fits your codebase.
4
Copy and use
Click to copy a single UUID or use "Copy All" for bulk results. Paste directly into your database, config files, or code.
Try It Now — Free
No signup, no download. Runs entirely in your browser.
Open UUID GeneratorFrequently Asked Questions
Are these UUIDs truly random?
Yes. They use the Web Crypto API (crypto.getRandomValues) which provides cryptographically secure random numbers.
Will I get duplicate UUIDs?
Practically impossible. UUID v4 has 122 random bits, giving 5.3×10³⁶ possible values. The odds of collision are astronomically low.
UUID vs GUID — what is the difference?
They are the same thing. UUID (Universally Unique Identifier) is the standard term. GUID (Globally Unique Identifier) is Microsoft's name for it.