400 Error -solution

How to fix 400 Bad Request Error of your own?

fix 400 bad request error

If you’re browsing frequently, you may have this error while accessing some websites. HyperText Transfer Protocol status codes refer to the issues caused during client-server communication. HTTP 400 Bad Request is one of the HTTP status code, let’s see how to fix 400 bad request.

The status code HTTP 400 indicates that the server is unable to process the client’s request due to a malicious request, which means the data stream sent to the server by the client didn’t follow the rules. If the request has corrupted, the server couldn’t understand and displays 400 – bad request. There are various HTTP status codes for different reasons.

400 error displays differently for different websites/browsers,

  • 400 Bad Request
  • Bad Request – Invalid URL
  • HTTP Error 400 – Bad Request
  • Bad Request: Error 400
  • HTTP Error 400. The request hostname is invalid
  • Bad Request. Your browser sent a request that this server could not understand
  • 400 – Bad request. The request could not be understood by the server due to malformed syntax. The client should not repeat the request without modifications.

Causes for 400 – Bad Request

400 Bad Request

Here are some of the causes for 400 Bad requests:

  • The most common reason for this error is due to the request from the incorrect or corrupted URL, malformed syntax, or a URL that contains illegal characters.
  • If the uploading file size is too large, some web servers have a limit for uploading large files which reduces the server resources. In this case, you will have a 400- bad request.
  • If there is a corrupted file in the browser cache or with the cookies, 400 Bad Request occur.
  • The 400 Bad Request may happen when the DNS data stored locally is out of sync with registered DNS information.

How to fix this error?

It’s a simple issue that can be solved with a few steps:

  • First, check the URL that you have requested. Check clearly the spelling, hyphens, page extensions, slashes, etc. Also, check for other non-allowed characters like a percentage.
  • Clear browser cache and cookies. You will browse and visit different websites so it saves the contents/data in temporary storage. Suppose, the website you have visited has corrupted files and its data is stored locally, this cause 400 Bad Request. So clear the browser cache and cookies regularly.
  • Clear DNS cache. Your Domain Name System cache stores the IP address of web servers that you have visited recently. If you’re creating a web site or configuring domain settings, your computer’s  DNS cache will prevent you from accessing the corresponding website. If you encounter 400 Bad Request error codes, you need to clear your DNS cache.
  • Check File upload size. If you’re uploading a file for which the file size exceeds the limit, 400 bad requests will occur.

 These are the possible steps to fix the error. If you’re still facing any issues, then you need to contact your hosting service provider.


Refer below to fix the following errors,

HTTP 500 Internal Server Error

403 Forbidden error

401 Unauthorized

404 Not found

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