A 414 Request-URI Too Long error means the address requested is longer than the web server is willing to process. Servers cap URL length (typically around 8 KB) to protect themselves. A normal page URL never comes close, so a 414 error almost always points to a bug that keeps growing the URL.
Before you start
- Copy the full URL from the address bar into a text editor so you can see what repeats.
- cPanel or SSH access to the site's
.htaccessand code.
Common causes of a 414 error
- A redirect loop that appends parameters, for example each hop adding
?redirect_to=or&lang=again. - A form using GET for large data, so all fields end up in the URL.
- Search or filter pages stacking many filters into the query string.
- Tracking links with very long encoded parameters, or URLs encoded several times (
%25252F).
How to fix a 414 Request-URI Too Long error
- Look at the URL. If one parameter repeats many times, you are looking at a loop. Clear cookies for the site and load the plain home page to confirm it starts clean.
- Find the redirect rule. Check
.htaccessforRewriteRulelines with[QSA]or that add a query string, and review redirects in cPanel → Domains → Redirects. Our redirect loop guide shows how to trace each hop withcurl -IL. - Check login and language plugins on WordPress, which commonly build
redirect_tochains. Disable them one at a time. - Switch big forms to POST. Change
<form method="get">tomethod="post"when it sends a lot of data. - Simplify filter URLs in your application, or store filter state in a session instead of the URL.
- Raise the limit only as a last resort on your own VPS (Apache
LimitRequestLine, Nginxlarge_client_header_buffers). On shared hosting the limit is fixed, and raising it never fixes a loop.
Warning: Raising the URL length limit hides a redirect loop instead of fixing it. Always find out why the URL keeps growing first.
What to check afterwards
Repeat the steps that produced the error. The URL should stay short. Run curl -IL https://example.com/ and confirm there are only one or two redirects.
FAQ
What is the maximum URL length?
There is no single standard. Browsers accept long URLs, but servers often limit the request line to about 8 KB.
Why does 414 appear only when I am logged in?
A login or membership plugin is probably adding a return URL on every redirect. Clear cookies and check that plugin.
Can a 414 error be caused by the browser?
Rarely. A corrupted bookmark with a huge URL can trigger it; load the site from the home page.