UUID Generator

Generate random RFC 4122 UUIDs (v4) instantly in your browser.


  

  

    
    
    
  

  


    

    

      
ToolsSoup's UUID Generator is a free online tool that creates random RFC 4122 version 4 UUIDs instantly, right in your browser. Generate a single identifier or bulk-create up to a thousand at once, toggle uppercase or remove hyphens to match your format, and copy them with one click — no uploads, no sign-up, and nothing ever leaving your device.

      

        
What is a UUID?

        
A UUID (Universally Unique Identifier), also called a GUID (Globally Unique Identifier), is a 128-bit value used to label information without a central authority. It is usually written as 32 hexadecimal digits in five hyphen-separated groups, such as 550e8400-e29b-41d4-a716-446655440000. Because each value is drawn from such an enormous space, two independently generated UUIDs are effectively guaranteed never to collide, which makes them ideal for database primary keys, distributed systems, file names, request IDs, and API tokens.

        
      

      

        
How to generate a UUID online

        
Creating UUIDs with ToolsSoup takes just a few seconds:

        
  1. Choose the UUID type — Version 4 for cryptographically random IDs, or the Nil UUID of all zeros.
  2. Set how many you need and toggle Uppercase or Hyphens to match your format.
  3. Click Generate, then copy the result with one click and paste it wherever you need it.

      

      

        
What is a version 4 UUID?

        
A version 4 UUID is generated entirely from random (or pseudo-random) numbers, with a few bits reserved to mark the version and variant. ToolsSoup uses your browser's built-in cryptographically secure random number generator, so the values are unpredictable and suitable for use as identifiers. Unlike version 1 UUIDs, a v4 UUID contains no timestamp or hardware address, so it reveals nothing about when or where it was created.

        
      

      

        
Why use this UUID generator?

        
  • 100% free with no ads, sign-up, or usage limits.
  • Runs entirely in your browser — UUIDs are generated locally and never uploaded.
  • Uses a cryptographically secure random source for genuine version 4 UUIDs.
  • Generate up to 1000 identifiers at once and copy them all in one click.
  • Works offline once the page has loaded.

      

      

        
Frequently asked questions

        

          
Is this UUID generator free?

          
Yes. Every tool on ToolsSoup is completely free to use, with no account, sign-up, or hidden limits.

        

        

          
Are the generated UUIDs really unique?

          
Version 4 UUIDs are drawn from 122 random bits, giving over 5 undecillion possible values. The chance of generating the same UUID twice is so vanishingly small that they are treated as unique in practice.

        

        

          
Are the UUIDs cryptographically secure?

          
The values come from your browser's crypto random number generator, which is a cryptographically secure source. This makes them hard to predict, though a UUID is an identifier rather than a secret and should not be used in place of a password or key.

        

        

          
What is the difference between a UUID and a GUID?

          
They are the same thing. GUID (Globally Unique Identifier) is the name Microsoft uses for what the RFC 4122 standard calls a UUID. Both are 128-bit identifiers written the same way.

        

        

          
Can I generate UUIDs without hyphens or in uppercase?

          
Yes. Use the Hyphens toggle to output a compact 32-character form with no dashes, and the Uppercase toggle to switch the hexadecimal letters to capitals — handy for systems that expect a specific format.