How to Fix 414 URI Too Long Error

By ErrorFix · Updated October 25, 2026 · 7 min read

What 414 URI Too Long means

Every time you open a page, your browser sends the server a request line that starts with the address you want, known as the URI. Servers put a cap on how long that line can be, often around 8,000 characters, because an endless address would waste memory and could be used to attack the server. HTTP status 414, URI Too Long (formerly called Request-URI Too Long), means your request crossed that cap, so the server refused it outright instead of trying to load the page. The page itself may be perfectly fine; the server simply never got a usable address to work with.

You will usually meet a 414 on links packed with tracking parameters, search or filter pages that cram every selection into the URL, and pages caught in a redirect loop that appends a new parameter on every hop. Long addresses also grow when characters are percent-encoded, so a URL full of spaces, symbols, or non-English characters can triple in length once encoded. A related error is 431, which means the headers as a whole, often bloated cookies, are too large, while 413 means the uploaded body is too large. With a 414, the address itself is the problem, so the fix is to make the address shorter, stop the loop that keeps lengthening it, or, for site owners, raise the limit for genuinely long but legitimate URLs.

Common causes

• Overly long query string: tracking parameters, filter selections, and search terms stacked onto one URL until it passes the server's length limit.
• Redirect loop adding parameters: each redirect appends another parameter, so the address grows with every hop until the server refuses it with a 414.
• Bloated cookies and headers: oversized cookies and other headers travel with the request and can push the total request size over the limit even when the visible URL looks short.
• Overlong slugs and deep paths: very long page titles turned into slugs, deeply nested paths, and heavily percent-encoded characters inflate the address far beyond what it looks like.
• Low server limit for the site: a server configured with a small request-line limit rejects URLs that other servers would accept, especially on sites with long filter or search URLs.

How to fix the 414 URI Too Long error — step by step

Start with the visitor steps (1–3). If you control the site, steps 4–6 are where most persistent 414 errors get fixed.

1. Shorten the address and strip unnecessary parameters. Start with the address itself. If the URL in your address bar is very long, trim it back to the main page, then navigate from there. Remove tracking parameters such as utm_source, utm_medium, and fbclid, and delete any repeated or duplicated query values. If you reached the page from a search result, a bookmark, or a shared link, try the site's homepage and use its search or menus to reach the same content. If the shortened address loads, the original link was simply too long, and nothing on your device needs fixing.
2. Clear cookies and site data, then test in an incognito window. Cookies and other stored site data travel with every request, and a bloated cookie jar can push a request over the server's header limit even when the visible URL looks normal. Press Ctrl + Shift + Delete, set the range to All time, check Cookies and other site data and Cached images and files, and click Clear data. Then open an incognito window (Ctrl + Shift + N) and try the same link again. If it works in incognito, a cookie or cached redirect in your normal window is inflating the request, and clearing data for that site should fix it.
3. Check for a redirect loop that keeps adding parameters. Some 414 errors are caused by a redirect loop: each redirect adds another parameter to the URL, so the address grows with every hop until the server gives up. Watch the address bar as the page loads: if the URL keeps changing and growing, or the page flashes between addresses, a loop is likely. Try the page in a different browser, on your phone's mobile data, and without any VPN or proxy extension. If the loop only happens for one site, tell the site owner, because the fix is in their redirect rules, not in your browser.
4. Site owner: raise the server's header and URL limits. If you own the site, the limit itself may be too low for legitimate requests. In Apache, raise LimitRequestLine and LimitRequestFieldSize in the server or virtual host configuration. In Nginx, raise large_client_header_buffers and client_header_buffer_size. In IIS, raise maxUrlLength and maxQueryStringLength in the request filtering settings. Raise the limits in small steps, restart or reload the server, and retest the failing URL. Do not raise them without limit, because very large headers can be abused to waste server memory.
5. Fix the code that builds overlong URLs. Raising limits only hides the problem if your own code keeps building longer and longer addresses. Look for forms and links that pass large amounts of data in the URL with a GET request, and switch those to POST so the data travels in the request body instead. Shorten slugs, avoid repeating the same parameter many times, paginate long filter lists instead of putting every selection in one URL, and use short identifiers instead of embedding whole sentences or encoded blobs in links. After the change, test the same action and confirm the resulting URL stays short.
6. Test with curl and check the server logs. To prove where the failure happens, test from a terminal with curl -I followed by the URL. A short URL should return 200, while the overlong version returns 414, which confirms the length is the trigger. Check the server error log for the matching 414 entries, which show the exact request line that was refused and how long it was. If the log shows the same URL growing across redirects, fix the redirect rules first. If it shows one very long request from a single form or API call, fix that call before raising limits any further.

Did this fix it? Quick checklist

• The shortened URL loads without a 414 message
• It works in an incognito window and after clearing cookies
• No redirect loop keeps adding parameters to the address
• The server limit and the code building URLs are both fixed, not just one

If the error only appears on one site, the site's own links or redirect rules are the prime suspect, and a shorter link to the same content usually works around it. If it appears on many sites at once, a browser extension, a proxy, or a cookie problem on your device is more likely: test in incognito first, then test on mobile data before reinstalling anything.