Page diagnostics for SharePoint - Chrome Web Store
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A tool to identify page performance problems in SharePoint Online

Page Diagnostics for SharePoint Online is aimed at assisting our customers optimize the performance of their Classic and Modern SharePoint site pages. The tool does not make any changes but rather highlights recommended practices showing them in an Attention Required, Improvement Opportunities and No Action Required sections. Reducing the server time and load on SQL within SharePoint is an important part of maintaining consistent performance with SharePoint and in particular SharePoint Online especially considering the performance optimizations Microsoft has made. The tool will highlight some of the optimizations and recommend utilizing these available resources. Each recommended practice also has a “Learn more” link to direct you to the right resource to assist you. Please also review the “How to use this tool” guide available from the About page. This extension supports SharePoint Online and is not designed for SharePoint on-Premises. Privacy Policy:

4 out of 56 ratings

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Sean McDonoughSep 19, 2019

I do a fair bit of work speaking on and helping others troubleshoot SharePoint Online (SPO) performance issues, and in this tool's current release (v2.0.1), the Page Diagnostics Extension addresses many of the gaps that were present in v1.x of the extension. The tool is no longer limited to classic mode pages (it handles modern pages just fine), and this version provides prominent links to additional resources which help to educate and explain many of the factors influencing SPO page performa... Show more

5 out of 6 found this helpful
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James AJul 2, 2019

As of this writing, this extension does not work with Modern SharePoint pages, only Classic pages. It notifies you if you run it on a Modern page that it may produce unreliable results, so be aware.

2 out of 3 found this helpful
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Richard GiganJul 13, 2018

It's good tools, but is always active and flood console box with useless log ... please add disable button or delete the useless log : "Copying network performance info... contentScript.js:52 CustomEvent {isTrusted: false, detail: {…}, type: "SP-YSLOW-WINDOW-PERF", target: document, currentTarget: document, …}"

1 person found this review to be helpful


  • Version
  • Updated
    January 27, 2023
  • Offered by
    Microsoft Corporation
  • Size
  • Languages
    39 languages
  • Developer
    Microsoft Corporation
    One Microsoft Way Redmond, WA 98052 US
  • Trader
    This developer has identified itself as a trader per the definition from the European Union.


Page diagnostics for SharePoint has disclosed the following information regarding the collection and usage of your data. More detailed information can be found in the developer's privacy policy.

Page diagnostics for SharePoint handles the following:


This developer declares that your data is

  • Not being sold to third parties, outside of the approved use cases
  • Not being used or transferred for purposes that are unrelated to the item's core functionality
  • Not being used or transferred to determine creditworthiness or for lending purposes


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