When a website fails to load, it’s simply annoying. It’s important to understand, though, why that happened so you know how to fix it.
The 4xx family of status codes is the one we’re investigating here as they relate to invalid or corrupt requests from the client. Specifically, we’ll take a closer look at the 400 Bad Request error: what this error means, what causes it as well as some specific steps to fix the issue.
What is a 400 Bad Request Error?
A 400 Bad Request, also known as a 400 error or, is perceived by the server as a generic client error and it is returned when the server determines the error doesn’t fall in any of the other status code categories.
The key concept to understand here is that the 400 Bad Request error is something that has to do with the submitted request from the client before it is even processed by the server.
What Causes a 400 Bad Request Error
1. URL String Syntax Error
2. Corrupted Browser Cache & Cookies
3. DNS Lookup Cache
4. File Size Too Large
5. Generic Server Error
How to Fix 400 Bad Request Error
Complete the steps outlined in this section to help diagnose and correct a 400 Bad Request.
The proposed solutions include:
- 1. Check the Submitted URL
- 2. Clear Browser Cache
- 3. Clear Browser Cookies
- 4. File Upload Exceeds Server Limit
- 5. Clear DNS Cache
- 6. Deactivate Browser Extensions