HTTP 414 URI Too Long

What HTTP 414 means

Usually caused by sending large data in a query string, such as a long list of IDs or a redirect loop that keeps appending parameters. Servers typically allow URLs of around 8 KB.

How to fix a 414 error

• Move large inputs into a POST body.
• Look for redirect loops that grow the URL on each hop.

Retrying

No. Fix the request first; sending it again unchanged will get the same response.

Example response

HTTP/1.1 414 URI Too Long
Date: Wed, 21 Oct 2026 10:30:00 GMT
Content-Type: application/json

How to return 414

res.status(414).json({ error: 'URI Too Long' });

from fastapi import HTTPException

raise HTTPException(status_code=414, detail="URI Too Long")

http.Error(w, http.StatusText(http.StatusRequestURITooLong), http.StatusRequestURITooLong)

location /private/ {
    return 414;
}

Related status codes

• 413 Content Too Large : The request body is larger than the server allows.
• 431 Request Header Fields Too Large : The request headers, often cookies, are too large for the server.
• 400 Bad Request : The server can’t process the request because it is malformed.

Other 4xx status codes

400 Bad Request · 401 Unauthorized · 402 Payment Required · 403 Forbidden · 404 Not Found · 405 Method Not Allowed · 406 Not Acceptable · 407 Proxy Authentication Required · 408 Request Timeout · 409 Conflict · 410 Gone · 411 Length Required · 412 Precondition Failed · 413 Content Too Large · 415 Unsupported Media Type · 416 Range Not Satisfiable · 417 Expectation Failed · 418 I’m a Teapot · 421 Misdirected Request · 422 Unprocessable Content · 423 Locked · 424 Failed Dependency · 425 Too Early · 426 Upgrade Required · 428 Precondition Required · 429 Too Many Requests · 431 Request Header Fields Too Large · 444 No Response · 451 Unavailable For Legal Reasons · 499 Client Closed Request

See the full list of HTTP status codes.

Sources

• RFC 9110, section 414
• IANA HTTP Status Code Registry
• MDN: 414 URI Too Long

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Frequently asked questions