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HTTP Status Code
414 URI Too Long
Client ErrorThe request URI is longer than the server is willing to process.
HTTP status code reference, response example, common causes, fixes, and related status codes.
What does HTTP 414 URI Too Long mean?
HTTP 414 URI Too Long is a status code sent by a server to indicate the result of an HTTP request.
Status codes help browsers, APIs, apps, and backend systems understand whether a request succeeded, failed, was redirected, or needs additional action.
In practice, HTTP 414 URI Too Long usually appears when a server responds under specific request, validation, permission, or infrastructure conditions.
Response example
HTTP/1.1 414 URI Too Long
HTTP example
HTTP/1.1 414 URI Too Long
Common causes
- Very long query string
- Too much data passed in URL parameters
How to fix it
- Move large data to the request body
- Use POST instead of GET when appropriate
Common mistakes
- Assuming the status code alone explains the full backend issue
- Ignoring related response headers that add important context
- Treating temporary errors as permanent failures
- Retrying too aggressively without checking the cause
- Debugging the frontend only when the problem is server-side
How browsers and APIs use it
Browsers, APIs, and backend services use HTTP status codes to understand the outcome of a request. Depending on the status code, an application may render content, retry a request, redirect the user, show an error, or trigger a different flow in the client or server.
Developer note
If a frontend app serializes too much state into the URL, HTTP 414 can appear quickly.