FIX: Err_spdy_protocol_error in Google Chrome

Milan Stanojevic
by Milan Stanojevic
Deputy Editor
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  • When it comes to web browsers, Google Chrome is the browser of choice for many.
  • To fix err_spdy_protocol_error, try disabling your antivirus or add Chrome to the list of exclusions in your firewall and antivirus.
  • Other errors reported by users have been collected in the Chrome errors section
  • If you interested in similar guides, be sure to check our Chrome hub, for more tips and tricks.
failed to load resource: net::err_spdy_protocol_error chrome

While browsing the Internet sometimes you can encounter certain errors. Windows 10 users reported Err_spdy_protocol_error message in their web browser.

Today we’re going to show you how to fix this error.

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How can I fix Err_spdy_protocol_error Chrome error?

1. Switch to another browser

Opera browser for Windows 10 Desktop

Wouldn’t it be great if this type of error would automatically solve itself?

There’s actually a browser that’s smart enough to handle protocol errors better. It’s called Opera and we think you should use it as a default browser.

It’s very easy: you download it, install, import your bookmarks from Chrome, and you are done.

You’ll get to experience and personalize the Speed Dial that shows when opening a new tab. You will get a built-in Adblocker which means that pages will load faster and have fewer banners.

Bypassing geo-restrictions is easy since Opera comes with a free, unlimited VPN that you can use just for that.

And there’s more: having less RAM used and a battery saver mode is something we should all enjoy.

Opera

Opera

Better handling of protocol errors. Switch to Opera for a faster, safer browsing experience and leave Chrome behind.

2. Disable your antivirus software

Users reported that this problem can occur due to your antivirus software, but you should be able to fix it by temporarily disabling it.

If disabling the antivirus software fixes the problem, you might want to consider switching to a different antivirus program.

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So, we already established that the antivirus you were using was causing the errors in the browser. Can you continue using your computer safely, browsing the Internet without protection?

No, we don’t recommend that. Instead, download and use Bitdefender Antivirus.

This household name continues to impress and improve their product. The virus detection engine is one of the best out there. It’s actually so good, that other antivirus makers incorporate and license the very same engine.

You will also get:

  • Low impact on the performance of your device
  • Battery mode
  • Ransomware Protection
  • Anti-Fraud, Anti-Phishing, and Web Attack Prevention
Bitdefender Antivirus Plus 2020+

Bitdefender Antivirus Plus 2020+

Extremely good protection for up to 3 devices. No meddling with the network and no protocol errors in the browser.

3. Flush sockets in Chrome

  1. In the browser address bar paste chrome://net-internals/#events&q=type:SPDY_SESSION%20is:active and press Enter.
  2. Now in the top right corner click the down arrow and choose Flush sockets option.
    err-spdy-protocol-error-flush-1
  3. Check if the problem is resolved.

If the issue still persists, do the following:

  1. In the Chrome address bar enter chrome://net-internals/#sockets. Press Enter.
  2. Click the Flush socket pools button.
    err-spdy-protocol-error-flush-2
  3. After doing that, check if the problem is resolved.

4. Add website to Avast Web Shield exclusions

Allow Chrome to access the network in your firewall

  1. Open Avast GUI and go to Settings.
  2. Select Active Protection and click on Customize for Web Shield.
  3. Add the website address to URLs to exclude section.
  4. After adding websites that you can’t access to the list, the error should be resolved.

Few users reported that they permanently fixed this issue by disabling the HTTPS Scanning option in Avast. According to them, you can fix this issue simply by following these steps:

  1. Go to Avast > Settings.
  2. Select Active Protection > Web Shield.
  3. Locate Enable HTTPS Scanning option and disable it.
  4. Click OK to save changes.
  5. Flush sockets like we showed you in Solution 1 and check if the error is resolved.

5. Restart your browser

According to users, sometimes you can fix this error simply by turning off and restarting your browser. After restarting the browser, check if the problem is resolved.


6. Check if your browser is up to date

  1. Click the Menu button in the top right corner and choose Settings from the menu.
    err-spdy-protocol-error-update-2
  2. When Settings tab opens, click on About link from the menu on the left.
  3. As soon as you open this tab Google Chrome will check for updates and download them automatically.
    err-spdy-protocol-error-update-1
  4. After downloading the updates, restart the browser and check if the error is resolved.

Keeping your browser up to date is important if you want to prevent errors such as this one from appearing, therefore we strongly suggest that you download the latest updates for your browser by following the steps above.


7. Use Incognito mode

  1. Click the Menu button in the top right corner.
  2. From the menu choose New incognito window. Alternatively, you can use Ctrl + Shift + N shortcut.
    err-spdy-protocol-error-icognito-1
  3. When Incognito mode starts, try to access the website and check if the problem is resolved.

8. Flush DNS and renew your IP

  1. Press Windows Key + X to open Win + X menu and select Command Prompt (Admin).
  2. After Command Prompt opens, enter ipconfig /flushdns and press Enter.
  3. Now enter ipconfig /release and press Enter. After that type ipconfig /renew and press Enter.
  4. After you’re done, close Command Prompt and check if the problem is resolved.

Keep in mind that you might have to configure your Internet connection again after performing these steps.


DNS Server not responding? Here’s a complete guide to fix it quickly in Windows 10


9. Clear browsing cache

  1. Press the Menu button in the top right corner and choose More Tools > Clear browsing data.
    err-spdy-protocol-error-clear-1
  2. When Clear browsing data tab opens in Obliterate the following items from select the beginning of time option.
  3. Check Cookies and other site and plugin data, Cached images and files and Hosted app data. You can also select Browsing history and Download history, but those two options aren’t mandatory.
  4. Click Clear browsing data button and wait for Chrome to clear the cache.
    err-spdy-protocol-error-clear-2
  5. After doing that, restart the browser and check if the problem is resolved.

10. Use Chrome Cleanup Tool

Some users are suggesting to use Chrome Cleanup Tool to fix this issue on Google Chrome, therefore you might want to try it. This tool can be used to remove problematic extensions that are interfering with your web browser and fix Err_spdy_protocol_error and other errors.

To fix this problem, simply download Chrome Cleanup Tool and run it. After the tool scans your PC, check if the problem is resolved.

Some users have also asked us about err_spdy_protocol_error IIS – this error is related to a misconfiguration on the IIS web-server and has nothing to do with the user.

Err spdy protocol error message can prevent you from accessing your favorite websites, but as you can see, this error can be solved by following the steps described in this article.

Let us know in the comments below what worked for you.

FAQ: Learn more about Google Chrome

  • How do I fix unsupported protocol in Chrome?

To fix this error, make sure that your data and time are correct. Also, make sure that Chrome is allowed through your firewall.

  • How do I clear SSL state in Chrome?

To clear SSL state in Chrome, go to Settings > Advanced settings. Now click on Change proxy settings > Content. Click on Clear SSL state.

  • How do I uninstall and reinstall Chrome?

To uninstall Chrome, go to Settings app > Apps, select Chrome and click the Uninstall button. To see how to install Chrome, check out our Chrome installation guide.

  • Where are Chrome bookmarks stored?

Chrome bookmarks are stored AppData\Local\Google\Chrome\User Data\Default directory.

Editor’s Note: This post was originally published in October 2016 and has been since revamped and updated in August 2020 for freshness, accuracy, and comprehensiveness.

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