Hi dear! Whenever I am trying to access a website via my Chrome browser, I keep receiving ERR_SPDY_INADEQUATE_TRANSPORT_SECURITY Error.  I tried with using Incognito, restarting the web browser and refresh the webpage and it did not work. Please, help me to get rid of the issue.

Google Chrome is undoubtedly the most popular web browser in the world. With over 65% of share, it has been dominating since decade from now and it does not seem like anytime nearer some other web browser will replace it.

The Chrome’s preferences, simplicity the use, expansive extension selection and numerous other useful functionalities make it the users’ first choice. Nevertheless, it also faced criticism in the years, mostly concerning about privacy issues by users or experts or its extensive usage of hardware resources when in operation and similar.

There have been also various reported errors during the period. One such error is ERR_SPDY_INADEQUATE_TRANSPORT_SECURITY Error in Chrome that we are going to discuss in this article.

People encounter this error while trying to access a specific website within an error message “this site can’t be reached”. The same site can easily be opened on other web browser. However, some users have reported ERR_SPDY_INADEQUATE_TRANSPORT_SECURITY Error in Firefox as well.

The issue is within the HTTP/2. On Windows 2016 and onwards, this option is enabled. Your Chrome version might not support it and due to which the issue results in. Sometimes, the issue is within the website itself and we, the users can’t do anything in such a case.

We are talking about the possible solutions that you can try by your side, as a user. There are different fixes possible that we have discussed below – do check it out. But before that, make sure you use PC Repair Tool – an automatic tool to check for different system inconsistencies and provide their automatic fixes.


Fix 1: Update your web browser

Very first, you should check if your web browser is updated. Many a problem occurs on system while running an outdated Chrome browser. Usually, Chrome updates automatically after you reboot it, so if you have never shut it down, you can try this option or otherwise there is a simple way to update your web browser that you can check below:

  • Open Chrome,
  • Go to its menu and select Settings,
  • On the left, click About Chrome,
  • The web browser will check for the update and automatically download and install the latest version Chrome,
  • After the process is complete, restart your computer and see if the problem is resolved.

Fix 2: Disable SPDY and HTPP/2

If ERR_SPDY_INADEQUATE_TRANSPORT_SECURITY Error in Chrome continues, you should try with disabling your HTTPP/2 protocol and SPDY in Chrome. Many a user dealing with this issue managed to resolve it just by doing this:

  • Right-click on the Chrome shortcut icon on the desktop and select Properties,
  • In the Shortcut tab, and within the Target box, type one of the following lines:


  • Click Apply and confirm with Ok to resolve the issue.

Fix 3: Edit Windows Registry

 This is the common issue with websites hosted on hosted on IIS 10.0, with the HTTP/2 protocol enabled, below is the recommended change that you should make in the Windows Registry Editor to resolve the issue:

  • Press Win+ R, type in regedit and hit Enter,
  • If received UAC prompt, click Yes,
  • Navigate to the below location now:


  • Right-click on anywhere in the empty space on the right and select New> DWORD (32-bit) value,
  • Name it EnableHttp2TIs,
  • Double-click on it and set it value to O,
  • Click on OK to save the changes,
  • Next, Create EnableHttp2Cleartext entry the same way and make sure you set its value to 0.


That’s all!  We have provided all possible fixes for ERR_SPDY_INADEQUATE_TRANSPORT_SECURITY Error in Chrome. Hope so, these fixes provide you the required fixes. Comment down below in case of any queries, questions or suggestions regarding the post.