Nginx Server Errors
Nginx 413 Payload Too Large
Payload Too Large — the request body exceeds the size limit enforced by the server
What 413 Means
The 413 error on the Nginx Server Errors indicates payload too large — the request body exceeds the size limit enforced by the server. This typically occurs due to file upload exceeds the configured body size limit.
Nginx 413 appears when the request body is larger than the limit allowed at the web server, proxy, or upstream layer. It commonly shows up on file uploads, API requests with large JSON bodies, or form submissions carrying encoded media. The route may be valid, but the body is rejected before the application can process it fully.
Technical Background
A 413 response means the server knows how large the body is and has decided that the payload is too large for the current request path or configuration. This makes it a size-policy response, not a parsing failure.
In Nginx setups, the rejection often happens before the upstream application can inspect the request at all. That is why 413 is different from 411 and 414. A 411 is about missing or unusable length framing, while a 414 is about an oversized URL rather than an oversized body.
Common Causes
- File upload exceeds the configured body size limit
- Large JSON or multipart request crosses the allowed threshold
- Proxy and upstream services apply stricter size limits than the client expects
Typical Scenarios
- A file upload is larger than the request size allowed for that endpoint
- A client sends a very large JSON payload to an API behind Nginx
- An application stack has different size limits across the edge proxy and the upstream service
What to Know
A 413 usually affects specific upload flows, API operations, or request paths rather than every page on the site. When one client or endpoint sees it repeatedly, the shared pattern is often body size expectations across the proxy chain.
Frequently Asked Questions
Common questions about Nginx 413 error
It means the request body was larger than the size limit enforced for that server, proxy path, or upstream integration.
A 413 is about an oversized request body such as an upload or large JSON payload. A 414 is about a URL that is too long for the server to accept.
Yes. Nginx commonly rejects the request at the edge before the upstream application sees it, so the application itself can remain fully healthy while 413 responses appear.