HTTP 414 URI Too Long

Client error code, RFC 9110, section 15.5.15

What it means

The address in the request is longer than the server is willing to handle.

A real response

This is the request and the answer our test server gave when we asked it to return 414.

GET /c/414 HTTP/1.1
Host: example.com

HTTP/1.1 414 URI Too Long
Date: Sat, 14 Nov 2026 10:00:00 GMT
Content-Type: text/html; charset=utf-8
Content-Length: 11

<p>demo</p>

If you run the site

Look for long query strings, and for forms that use GET with a lot of data: send big data in a POST body instead. A redirect loop that keeps adding to the address can also end in 414.

If you are a visitor

Use a shorter address, or go to the page from the site's own links.

A common mistake

Putting long text or tokens into the address when a POST would do.

Registered in the IANA HTTP Status Code Registry as URI Too Long, defined in RFC 9110, section 15.5.15.

This is an independent guide. It is not connected with the IETF, IANA, any browser maker or any company named here. Meanings were checked against the RFC texts on 14 November 2026. Responses shown were recorded on 14 November 2026 from a small test server on the author's own computer.