The [UUID](https://www.mparticle.com/blog/what-is-a-uuid/), a universally unique identifier, can be created using the `randomUUID` method of the global property **`crypto`**. This method will generate the v4 UUID using a cryptographically secure random number generator.

#   
#  Syntax 
```
crypto.randomUUID()
```
#    
## Arguments 
This method doesn't take any argument.

##
## Return value 

This method returns a string value that contains a randomly generated v4 UUID. The returned string will have 36 characters.

## Code 
The below code demonstrates how to generate a random UUID in JavaScript.

<html>
 <head>
 </head>
 <body>
   <script>
      console.log("Random UUID -> " +crypto.randomUUID());
      console.log("Random UUID -> " +crypto.randomUUID());
      console.log("Random UUID -> " +crypto.randomUUID());
      console.log("Random UUID -> " +crypto.randomUUID());
   </script> 
 </body>
</html>

codemirror

console

# 
## Explanation

- Lines 6-9: We've used the `crypto.randomUUID` method to generate the random v4 UUID. 

> Note: The v4 UUID will have the character `4` in the first position of the third section of the UUID. Ex: `c7d03fd6-c898-4b79-83c3-e13fe4f41b4c` in this UUID after the second hyphen the character `4` will be present.

How to create a random UUID in JavaScript

Generate random UUIDs in JavaScript using crypto.randomUUID(), returning a 36-character v4 UUID string.