UUID Generator
Generate random RFC-4122 version-4 UUIDs (also called GUIDs) in your browser. Choose how many you need, toggle uppercase or hyphens, and copy the results instantly — nothing is uploaded.
Options
Quantity
Uppercase
Hyphens
How to use UUID Generator
- 1
Set the quantity
Choose how many UUIDs you need, from 1 up to 100, using the quantity field or the plus and minus buttons.
- 2
Choose the format
Toggle Uppercase for capital hexadecimal letters and toggle Hyphens to keep or strip the four dashes from each ID.
- 3
Generate the IDs
Click Generate to create cryptographically random version-4 UUIDs, each listed on its own line.
- 4
Copy the results
Use the Copy button to copy the whole list at once, ready to paste into code, a database, or a spreadsheet.
Frequently asked questions
What kind of UUIDs does this generate?
It generates RFC-4122 version-4 UUIDs, also called GUIDs, which are 128-bit identifiers built almost entirely from random bits. They are the standard choice when you need a unique ID without a central registry.
How are the random values produced?
The generator uses your browser's built-in crypto.randomUUID() API, a cryptographically secure random source, with a safe fallback. That makes the output suitable for production keys, tokens, and database records.
How many UUIDs can I create at once?
You can generate up to 100 UUIDs in a single click. Each one appears on its own line, and the Copy button grabs the entire batch together.
Are the generated UUIDs really unique?
Version-4 UUIDs have 122 random bits, giving roughly 5.3 x 10^36 possibilities. The chance of two colliding is so vanishingly small that they are treated as unique for all practical purposes.
Is anything sent to a server?
No. Every UUID is generated locally in your browser and never transmitted or stored anywhere, so the tool is private, free, and safe for sensitive identifiers.
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