ent_hints) request header provides
the user-agent's full version string.

Header type  |  [ Request header ](/en-US/docs/Glossary/Request_header) , [ Client hint ](/en-US/docs/Web/HTTP/Client_hints)  
---|---  
[ Forbidden header name ](/en-US/docs/Glossary/Forbidden_header_name) |  yes   
  
##  Syntax

http

    
    
    Sec-CH-UA-Full-Version: <version>
    

###  Directives

` <version> `

    

A string containing the full version number, like "96.0.4664.93".

##  Examples

A server requests the ` Sec-CH-UA-Full-Version ` header by including the [ `
Accept-CH ` ](/en-US/docs/Web/HTTP/Headers/Accept-CH) in a _response_ to any
request from the client, using the name of the desired header as a token:

http

    
    
    HTTP/1.1 200 OK
    Accept-CH: Sec-CH-UA-Full-Version
    

The client may choose to provide the hint, and add the ` Sec-CH-UA-Full-
Version ` header to subsequent requests. For example, the client might add the
header as shown:

http

    
    
    GET /GET /my/page HTTP/1.1
    Host: example.site
    
    Sec-CH-UA: " Not A;Brand";v="99", "Chromium";v="96", "Google Chrome";v="96"
    Sec-CH-UA-Mobile: ?0
    Sec-CH-UA-Full-Version: "96.0.4664.110"
    Sec-CH-UA-Platform: "Windows"
    

##  Specifications

Specification  
---  
[ User-Agent Client Hints  
#  sec-ch-ua-full-version  ](https://wicg.github.io/ua-client-hints/#sec-ch-
ua-full-version)  
  
##  Browser compatibility

BCD tables only load in the browser  with JavaScript enabled. Enable
JavaScript to view data.

##  See also

  * [ Client hints ](/en-US/docs/Web/HTTP/Client_hints)
  * [ User-Agent Client Hints API ](/en-US/docs/Web/API/User-Agent_Client_Hints_API)
  * [ Improving user privacy and developer experience with User-Agent Client Hints ](https://developer.chrome.com/docs/privacy-security/user-agent-client-hints) (developer.chrome.com) 
  * [ ` Accept-CH ` ](/en-US/docs/Web/HTTP/Headers/Accept-CH)
  * [ HTTP Caching > Vary ](/en-US/docs/Web/HTTP/Caching#vary) and [ ` Vary ` ](/en-US/docs/Web/HTTP/Headers/Vary)

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