414 URI Too Long — Causes & Fix
HTTP 414 (URI Too Long) means the requested URL is longer than the server is willing to interpret.
- Applies to
- Any website or web server (HTTP standard)
- Time to fix
- 5–30 minutes
What it means
Causes include huge query strings, a GET request that should be a POST, or a redirect loop appending parameters. HTTP status 414 is defined in RFC 9110 (HTTP Semantics). This is a client-side (4xx) error — the request itself had a problem, so the fix is usually on the requester's side or in how the server validates the request.
Symptoms
- "414 URI Too Long / Request-URI Too Large"
- Very long URLs fail
How to fix it
- 1
Use POST for large data
1. Move large parameters from the URL into a POST body.
- 2
Trim the URL / fix loops
1. Shorten query strings; check for a redirect loop that keeps appending parameters.
Frequently asked questions
What causes 414?
An excessively long URL — often too many query parameters or a loop. Send the data in a POST body instead of the URL.
Last updated July 20, 2026
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