Available Client Hints
Shown below are the list of Client Hints Infrastructure elements available to be requested by the server.
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Sec-CH-UA
"Google Chrome"; v="90"
Depends on browser
Specifies the User-Agent of the client.
Sec-CH-UA-ARCH
"x86"
"x86" or "ARM"
Architecture of the device (e.g., x86, ARM).
Sec-CH-UA-Bitness
64
32 or 64
Bitness of the architecture (e.g., 32 or 64).
Sec-CH-UA-Full-Version
"90.0.4430.212"
Version-specific
Full version of the User-Agent.
Sec-CH-UA-Full-Version-List
["90.0.4430.212", "91.0.4472.124"]
Version-specific
List of full User-Agent versions.
Sec-CH-UA-Mobile
?1
?0 or ?1
Indicates if the user agent is on a mobile device.
Sec-CH-UA-Model
"Pixel 5"
Depends on device
Model of the device
Sec-CH-UA-Platform
"Windows"
Depends on OS
Describes the platform the client is running on.
Sec-CH-UA-Platform-Version
"10"
Version-specific
Version of the platform the client is running on.
Sec-CH-UA-WoW64
Sec-CH-UA-WoW64
?0 or ?1
Indicates if the User-Agent is running in a 64-bit environment on Windows.
Sec-CH-Device-Memory
8
0
Amount of device memory in gigabytes.
Sec-CH-Downlink
10
0
Estimated downlink speed in Mbps.
Sec-CH-DPR
2.0
1.0
Device Pixel Ratio for responsive images.
Sec-CH-ECT
"4g"
"unknown"
Effective Connection Type, similar to ECT.
Sec-CH-Effective-Connection-Type
"4g"
"unknown"
Indicates the effective connection type.
Sec-CH-Pixel-Ratio
2.0
1.0
Specifies the pixel density of the device.
Sec-CH-Prefers-Color-Scheme
"dark"
"no preference"
Indicates the user's preferred color scheme.
Sec-CH-Prefers-Reduced-Motion
?1
?0 or ?1
Indicates the user's preference for reduced motion.
Sec-CH-RTT
50
0
Estimated Round Trip Time in milliseconds.
Sec-CH-Save-Data
?1
?0 or ?1
Indicates the user's preference for reduced data usage.
Sec-CH-Viewport-Height
800
depends on viewport
Height of the viewport in pixels.
Sec-CH-Viewport-Width
1280
depends on viewport
Width of the viewport in pixels.
Sec-CH-Width
1024
depends on layout
The width of the layout viewport in CSS pixels.