[ Permissions-Policy: fullscreen ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/fullscreen)
    14. [ Permissions-Policy: gamepad ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/gamepad) Experimental 
    15. [ Permissions-Policy: geolocation ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/geolocation)
    16. [ Permissions-Policy: gyroscope ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/gyroscope) Experimental 
    17. [ Permissions-Policy: hid ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/hid) Experimental 
    18. [ Permissions-Policy: identity-credentials-get ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/identity-credentials-get) Experimental 
    19. [ Permissions-Policy: idle-detection ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/idle-detection) Experimental 
    20. [ Permissions-Policy: local-fonts ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/local-fonts) Experimental 
    21. [ Permissions-Policy: magnetometer ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/magnetometer) Experimental 
    22. [ Permissions-Policy: microphone ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/microphone)
    23. [ Permissions-Policy: midi ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/midi) Experimental 
    24. [ Permissions-Policy: otp-credentials ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/otp-credentials) Experimental 
    25. [ Permissions-Policy: payment ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/payment) Experimental 
    26. [ Permissions-Policy: picture-in-picture ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/picture-in-picture) Experimental 
    27. [ Permissions-Policy: publickey-credentials-create ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/publickey-credentials-create) Experimental 
    28. [ Permissions-Policy: publickey-credentials-get ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/publickey-credentials-get)
    29. [ Permissions-Policy: screen-wake-lock ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/screen-wake-lock)
    30. [ Permissions-Policy: serial ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/serial) Experimental 
    31. [ Permissions-Policy: speaker-selection ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/speaker-selection) Experimental 
    32. [ Permissions-Policy: storage-access ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/storage-access) Experimental 
    33. [ Permissions-Policy: usb ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/usb) Experimental 
    34. [ Permissions-Policy: web-share ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/web-share)
    35. [ Permissions-Policy: window-management ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/window-management) Experimental 
    36. [ Permissions-Policy: xr-spatial-tracking ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy/xr-spatial-tracking) Experimental 

##  In this article

  * Syntax 
  * Directives 
  * Examples 
  * Specifications 
  * Browser compatibility 
  * See also 

#  Repr-Digest

**Experimental:** **This is an[ experimental technology ](/en-
US/docs/MDN/Writing_guidelines/Experimental_deprecated_obsolete#experimental)
**  
Check the  Browser compatibility table  carefully before using this in
production.

The **` Repr-Digest ` ** response or request header provides a [ digest ](/en-
US/docs/Glossary/Digest) of the [ selected representation ](https://www.rfc-
editor.org/rfc/rfc9110#section-6.4) of the target resource. It is invariant
under e.g., [ ` Content-Encoding ` ](/en-US/docs/Web/HTTP/Headers/Content-
Encoding) or [ ` Content-Range ` ](/en-US/docs/Web/HTTP/Headers/Content-Range)
, which do affect the [ ` Content-Digest ` ](/en-
US/docs/Web/HTTP/Headers/Content-Digest) . Furthermore, [ Content Negotiation
](/en-US/docs/Web/HTTP/Content_negotiation) can result in different selected
representations with different representation digests.

Header type  |  [ Representation header ](/en-US/docs/Glossary/Representation_header)  
---|---  
[ Forbidden header name ](/e