413Content Too Large
The request body is bigger than the server is willing to accept.
Browse all HTTP status codesWhen you see it
File uploads, mostly. The limit is often set by a web server or proxy sitting in front of the application, which means the application never sees the request and cannot produce a friendlier message.
What to do about it
As a visitor, make the file smaller. If it is an image, the image compressor will usually get it under a limit without a visible quality change, and the image resizer helps when the dimensions are the problem. For a PDF, splitting it with the PDF splitter is often enough.
If you run the server, the limit is normally a single configuration value, but raising it means accepting larger uploads everywhere, so it is worth checking the limit is actually wrong before changing it.
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