This is surprisingly easy to do by mistake and can happen if a URL has been encoding incorrectly. The HTTP error 400 can occur due to incorrectly typed URL, malformed syntax, or a URL that contains illegal characters. There are various root causes that can trigger the 400 Bad Request error and, even if this error isn’t specific to any particular browser or OS (operating system), the fixes do vary slightly. What Causes the HTTP 400 Bad Request Error? The 400 (Bad Request) status code indicates that the server cannot or will not process the request due to something that is perceived to be a client error (e.g., malformed request syntax, invalid request message framing, or deceptive request routing). The Internet Engineering Task Force (IETF) defines the 400 Bad Request as: 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.
400 Bad Request Error: What Does It Look Like?Ĭheck out our video guide to fixing 400 errors: What is a 400 Bad Request Error?Ī 400 Bad Request, also known as a 400 error or HTTP error 400, 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.
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