How to fix Error 400 Bad Request

What is Error 400 Bad Request

Error 400 Bad Request is an HTTP status code that indicates that the server cannot understand or process the request sent by your browser. This error can occur due to a variety of factors, including outdated cookies and cache, invalid syntax, or routing issues. The error message can appear on any browser and device and is usually displayed as a simple message, such as “400 Bad Request,” “HTTP Error 400,” or “Bad Request: Error 400”. The causes of Error 400 Bad Request can be divided into two categories: client-side issues and server-side issues. Client-side issues are usually related to the user’s browser, computer, or device, while server-side issues are related to the website or web application being accessed.

Error 400 Bad Request in Chrome

Error 400 Bad Request in Edge

Some common causes of Error 400 Bad Request include:

• Mistyped URL or illegal characters in the URL address
• Corrupted files in the browser cache and cookies
• Out-of-sync local DNS cache
• Expired or invalid cookies
• Malformed request syntax
• Invalid request message framing
• Deceptive request routing
• Large cookie data sent by the web browser

Here are some methods to fix Error 400 Bad Request in browsers:

1. Clear Cookies and Cache.

Clearing cookies and cache in your web browser can help resolve issues such as slow loading times, error messages, and website display problems. Here are the steps to clear cookies and cache in Chrome, Firefox, and Microsoft Edge on Windows 11:

Google Chrome

1. Click on the three-dot icon in the top-right corner of the browser window and go to More tools > Clear browsing data.
2. Pick a time range, check the box for Cached images and files, and click on Clear data.
3. Alternatively, you can use a keyboard shortcut to clear the cache. While in your browser, press Ctrl + Shift + Delete simultaneously on the keyboard to open the appropriate window.

Mozilla Firefox

1. Click on the three-line icon in the top-right corner of the browser window and go to Options > Privacy & Security.
2. Scroll down to the Cookies and Site Data section and click on Clear Data.
3. Check the box for Cached Web Content and click on Clear.
4. Alternatively, you can use a keyboard shortcut to clear the cache. While in your browser, press Ctrl + Shift + Delete simultaneously on the keyboard to open the appropriate window.

Microsoft Edge

1. Click on the three-dot icon in the top-right corner of the browser window and go to Settings > Privacy, search, and services.
2. Under Clear browsing data, click on Choose what to clear.
3. Check the box for Cached images and files and click on Clear now.
4. Alternatively, you can use a keyboard shortcut to clear the cache. While in your browser, press Ctrl + Shift + Delete simultaneously on the keyboard to open the appropriate window.

By following these steps, you can clear cookies and cache in Chrome, Firefox, and Microsoft Edge on Windows 11. This can help improve your browsing experience and resolve any issues you may be experiencing.

2. Disable Browser Extensions.

Browser extensions or add-ons can sometimes cause problems that affect the performance or functionality of Google Chrome. By disabling extensions or add-ons, you can determine if they are causing the issue you observed and then decide to either update or remove the problematic extension or add-on. To disable browser extensions in browsers, follow these steps:

Google Chrome

1. Open the Chrome browser and click on the three-dot menu icon in the upper right corner.
2. Click on More tools > Extensions.
3. Simple click the toggle next to the extension you want to disable to turn it off.
4. Alternatively, you can disable all extensions at once by using an extension such as Disable All Extensions.

Mozilla Firefox

1. Click on the three-line icon in the top-right corner of the browser window and go to Add-ons.
2. Select Extensions from the left navigation pane.
3. Click the blue toggle next to the extension you want to disable to turn it off.
4. Alternatively, you can disable all extensions at once by using an extension such as Disable Extensions Temporarily.

Microsoft Edge

1. Click on the three-dot icon in the top-right corner of the browser window and go to Extensions.
2. Select the extension you want to disable, then click on the gear icon next to it.
3. Toggle the switch to turn off the extension.
4. Alternatively, you can disable all extensions at once by using Group Policy Editor.

3. Clear DNS Cache

Flushing or clearing your DNS cache can help resolve security, internet connectivity, and HTTP errors, including Error 400 Bad Request. To clear DNS cache in Windows, follow these steps:

1. Open the Command Prompt by typing cmd in the Start menu’s search bar and pressing Enter.
2. Type ipconfig /flushdns in the Command Prompt and press Enter.

By following these methods, you can fix Error 400 Bad Request in Google Chrome, Firefox, or Edge and improve your browsing experience. If the issue persists, you can contact the website owner to check if they’re aware of the problem.