How do I fix 400 errors?

Alton Alexander
By Alton AlexanderUpdated on June 4th, 2022

The 400 Bad Request error means that the request you sent to the website server, often something simple like a request to load a web page, was somehow incorrect or corrupted.

The 400 Bad Request error displays inside the internet browser window, just like web pages do. The difference is that instead of providing a webpage, the browser provides a screen full of text describing the error.

The reason why you might see a 400 Bad Request error is because the server receiving the request from your browser cannot understand it. This can be due to a problem with the website, with your internet connection, or even with your computer.

Here are some things you can try to fix the 400 Bad Request error:

-Reload the web page. You can do this by pressing the F5 key on your keyboard.

-Clear your browser's cache. This is how you do it in some of the most popular browsers:

-For Chrome: Press Ctrl + Shift + Delete

-For Firefox: Press Ctrl + Shift + Delete

-For Microsoft Edge: Press Ctrl + Shift + Delete

-If you are using a Wi-Fi connection, try using a different one, or connecting your computer directly to your modem or router with an Ethernet cable.

-Restart your computer.

-Make sure that you are not using a proxy server.

You are here because you have a question about:

  • error code 400 bad request
  • 400 errors

1. Check the request URL to make sure it is valid and does not contain any errors

  1. Use the "Request URL Validation" tool in the Application Management Console to check the request URL.
  2. If there are any errors in the request URL, fix them.
  3. If the request URL still contains errors, contact your system administrator.

2. Check the request headers to make sure they are correct and do not contain any errors

  1. Check the request headers for any errors.
  2. Make sure the headers are correct and do not contain any errors.
  3. If the headers are correct, then check the request body for any errors.
  4. If the request body is correct, then check the request for any errors.

3. Check the request body to make sure it is correct and does not contain any errors

  1. In your browser, open the request body in a text editor.
  2. Check for any errors.
  3. If there are any errors, fix them.
  4. Save the request body.

If the answers above didn't work then you should also try:

  1. Check the server logs to see if there are any errors that could be causing the 400 error.
  2. Contact the website owner or administrator to see if they can help resolve the issue.