How to Fix the 400 Bad Request Error? (Reasons & Solutions)

The 400 bad request error is an HTTP status code, but this type of error occurs by an invalid request. Most of these errors are caused by providing an invalid URL to the server, sending incorrect file sizes, and more. This error can occur when using Google or another browser to access a website.

You can also get a lot of other messages due to these errors, including invalid URL, Error 400, the request hostname is invalid, and bad request. Now you can overcome this issue. If you want to know how to fix 400 bad request errors, Keep reading this article. Here we will discuss this topic:

Reasons for 400 Bad Request Error

This type of error occurs for various reasons. Here is a list of a few causes that notify you of this error.

Invalid URL Syntax

The HTTP error 400 mainly occurs when entering an invalid URL. In straightforward words, we can say that sometimes users enter a URL that doesn’t exit. They misspelled the URL or used invalid characters.

Incorrect file size

Another reason for this error is the use of an incorrect file size. Sometimes users try to upload large files on the sites, which fails the server. It responds to an invalid error because the host sets a maximum file size to upload on the server.

Server Error

An invalid error may also occur when loading a website on the same browser from different devices while the server is down.

Invalid Cookie

Expired cookies may also interrupt the request that responds to a 400 bad request error. It commonly happens on login pages.

Top 3 Methods to Fix 400 Bad Request Errors

There are countless methods available on the internet, but we discuss the best ones. Now you can solve your lousy request error by using these methods.

  1. Clear Your Browser’s Cache and Cookies

There are small files in a browser called cache. It saves data when we browse something in the browser, and the next time we visit that site, the page loads quickly. The browser’s cache, while reasonable, is also out of date and returns an invalid page. To solve this problem, you should have to clear your cache data and cookies from your browser.

  1. Need of File Compressor Tool

When you try to upload large files on a website or a server, it fails and gives you this error. To solve this problem, check the size of your file. If you have a large file size, use the ImageDiamond image compressor tool. It is a web-based tool that allows you to reduce image file size as much as you want for free. 

You can also use this tool to compress images file size in any format. It is the best online photo compressor tool that fulfills all your needs and has an easy-to-use interface for all users. Here, in this image compressor tool, you can also recover your compressed images from it within 24 hours, in case you lost them.

  1. Troubleshoot your Device and Internet Connection

Sometimes you lose your internet connection, which may lead to a 400 bad request error. To solve this issue, you can check your internet access. If you haven’t solved this problem, turn on your mobile data and connect your device to it. You can also contact your Wi-Fi service provider and tell them to solve this issue.


This error occurs when we send a request to the server that is invalid or corrupt. Many people face this problem, which is why we brought this article to you. I hope that after reading this article, you know how to fix 400 bad request errors. Here we discussed the best 3 ways to overcome this issue. Mostly, this error occurs when uploading large files to your website, so use the ImageDiamond Image compressor that compress photos file size in unlimited quantity.

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