4xx Client error

416 Range Not Satisfiable

The requested byte range is outside the file.

What 416 means

The Range header asked for bytes that don't exist, often because the file changed size since the download started.

Common causes

Resuming a download of a file that changed or shrank.

How to fix it

If you're calling an API

Restart the download without a Range header.

If you run the server

Send Content-Range with the actual size.

Should you retry?

Without the Range header.

Example response

HTTP

HTTP/1.1 416 Range Not Satisfiable
Content-Type: application/problem+json

{
  "type": "about:blank",
  "title": "Range Not Satisfiable",
  "status": 416,
  "detail": "The requested byte range is outside the file."
}

Related headers: Range, Content-Range.

Defined in: RFC 9110 (HTTP Semantics). 416 is a client error: change the request before retrying.

Debugging an API call? Convert your request with the cURL converter, check the response with the JSON formatter, or see whether the API is down on its status page.

HTTP 416 FAQ

What does HTTP 416 mean?

416 Range Not Satisfiable: The requested byte range is outside the file. The Range header asked for bytes that don't exist, often because the file changed size since the download started.

Is 416 a client or server error?

It's a client error (4xx): something about the request needs to change before it can succeed.

How do I fix a 416 error?

Restart the download without a Range header.

Should I retry after a 416?

Without the Range header.

Other 4xx status codes

All HTTP status codes