Decode the URL and encode it again to make sure it is correct. When encountering a 400 bad request error because of a wrong URL, use an encoder/decoder tool. If you enter a URL or click on a link that’s badly encoded, you’ll end up with a bad request error 400. However, a URL can be encoded incorrectly and thus contain incorrect syntax, like double percentage characters (%%). For example, one of the most common encodings is replacing space with %20. URL encoding converts characters into ASCII characters to make them transferable on the internet. If you type in in the URL bar with an extra percentage character, it will result in a 400 bad request error.Ī badly encoded URL can also cause this error. If the URL contains a directory path, file name, or query string, pay attention to special symbols such as a hyphen (-) or percentage character (%).įor example, is the correct domain name. It’s easy to mistype a URL, so be sure to check the domain name spelling. This may include a mistyped URL, malformed syntax, and illegal characters in the URL. One of the most common causes of HTTP status 400 bad request error is a wrong URL. If that doesn’t work, then you should try the following methods. The first action we recommend is refreshing the page. Bad DNS cache – if the website has moved to a new domain name or web host, the DNS cache data in your operating system may be invalid.This commonly happens on login pages such as the WordPress login page. Corrupted browser cookies or cache – expired cookies or corrupted browser cache may interfere with the request and trigger the error. An attempt to upload a file that exceeds this limit can be considered a bad request and trigger the HTTP 400 error status code.
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