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How to fix err_spdy_inadequate_transport_security in Chrome

How can I fix err_spdy_inadequate_transport_security error in Chrome?

1. Try using a different web browser

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Before we start fixing this issue, it’s important to determine if the problem is only appearing in Chrome. To do that, you can use any other browser, but we would recommend using Opera.

The browser is based on Chromium engine, so it’s pretty much similar to Chrome. It’s also worth mentioning that Opera works with all Chrome extensions, which is another plus.

Opera offers some unique features, and it allows you to organize tabs into workspaces. If needed, you can also use the built-in search to find any open tab with ease.

It’s important to mention that the browser has a built-in ad blocker and tracking protection, and for extra security, there’s a free VPN with unlimited bandwidth available.

Overall, Opera offers great features, and if you’re having issues with Chrome, Opera will be a perfect replacement.

Other great features:

  • Twitter and Instagram integration
  • Built-in messengers
  • Personalized news feed
  • Battery saver
  • Available on all desktop and mobile platforms


Forget all about err_spdy_inadequate_transport_security error in your browser by switching to Opera.

2. Modify the registry

  1. Press Windows Key + R and enter regedit. Press Enter or click OK.
    regedit run window err_spdy_inadequate_transport_security 
  2. When Registry Editor opens, navigate to the following path:
    parameters registry editor err_spdy_inadequate_transport_security
  3. Right-click the right pane and choose New > DWORD (32-bit) Value.
  4. Enter EnableHttp2Tls as the name and set the value of the DWORD to 0.
  5. Create a new DWORD, name it EnableHttp2Cleartext, and set its value to 0.
  6. After making these changes, restart your computer.

Keep in mind that these changes might cause your website to load slower. It’s also worth mentioning that this solution applies only to Windows Server.

3. Change Chrome launch parameters

  1. Locate Chrome shortcut, right-click it, and choose Properties from the menu.
  2. Navigate to the Shortcut tab. In the Target field add one of the following lines at the end:
    chrome properties err_spdy_inadequate_transport_security



After doing that HTTP2 or SPDY protocol will be disabled in Chrome.

This post was written by Milan Stanojevic and was first posted to WindowsReport

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