Control use of the File Handling API

Setting the policy to AskFileHandling lets web apps ask for access to file types via the File Handling API. Setting the policy to BlockFileHandling denies access to file types.

Leaving it unset lets web apps ask for access, but users can change this setting.

Supported on: At least Microsoft Windows 7 or Windows Server 2008 family

Control use of the File Handling API


  1. Do not allow any web app to access file types via the File Handling API
    Registry HiveHKEY_LOCAL_MACHINE or HKEY_CURRENT_USER
    Registry PathSoftware\Policies\Google\Chrome
    Value NameDefaultFileHandlingGuardSetting
    Value TypeREG_DWORD
    Value2
  2. Allow web apps to ask the user to grant access to file types via the File Handling API
    Registry HiveHKEY_LOCAL_MACHINE or HKEY_CURRENT_USER
    Registry PathSoftware\Policies\Google\Chrome
    Value NameDefaultFileHandlingGuardSetting
    Value TypeREG_DWORD
    Value3


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