What is DIAGPKG? DIAGPKG, short name for Diagnostics Package, is used as the file extension for Diagnostics Package files. .DIAGPKG files are XML files that are used to store Windows Diagnostics Packages. See the sample .DIAGPKG file included below.

File Extension: .DIAGPKG

MIME Type: text/xml

File Content: Diagnostics Package

.DIAGPKG files are Diagnostics Package files, that are used to store Windows Diagnostics Packages. Here is a sample .DIAGPKG Diagnostics Package file, DiagPackage.diagpkg:

<?xml version="1.0" encoding="utf-8"?>
<dcmPS:DiagnosticPackage SchemaVersion="1.0"
  Localized="true" 
  xmlns:dcmPS="http://www.microsoft.com/schemas/dcm/package/2007" 
  xmlns:dcmRS="http://www.microsoft.com/schemas/dcm/resource/2007">
  <DiagnosticIdentification>
    <ID>DeviceCenterDiagnostic</ID>
    <Version>1.1</Version>
  </DiagnosticIdentification>
  <DisplayInformation>
    <Parameters/>
    <Name>@diagpackage.dll,-1</Name>
    <Description>@diagpackage.dll,-2</Description>
  </DisplayInformation>
  <PrivacyLink>http://privacy.microsoft.com</PrivacyLink>
  <PowerShellVersion>1.0</PowerShellVersion>
  <SupportedOSVersion clientSupported="true" serverSupported="true">
    6.1
  </SupportedOSVersion>
  <Troubleshooter>
    <Script>
      <Parameters/>
      <ProcessArchitecture>Any</ProcessArchitecture>
      <RequiresElevation>false</RequiresElevation>
      <RequiresInteractivity>true</RequiresInteractivity>
      <FileName>TS_DeviceCenter.ps1</FileName>
      <ExtensionPoint/>
    </Script>
    <ExtensionPoint/>
  </Troubleshooter>
  ...

.DIAGPKG Diagnostics Package file sample: Click sample.diagpkg to download.

Since .DIAGPKG files are in text format, you can use Notepad or any text editor to create or modify them. No special software is needed.