What Is 404 Error And How To Fix It?

Tim Fisher has more than 30 years' of professional giải pháp công nghệ experience. He's been writing about tech for more than two decades và serves as the VP & General Manager of beyu.com.vn.

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A 404 error is an HTTP status code that means that the page you were trying lớn reach on a trang web couldn"t be found on their server.

To be clear, the error indicates that while the server itself is reachable, the specific page showing the error is not.

404 Not Found error messages are frequently customized by individual websites. So, keep in mind that the error might show up in just about any way imaginable depending on what website it's shown from.


In internet Explorer, the message The webpage cannot be found usually indicates an HTTP 404 error but a 400 Bad Request error is another possibility. You can kiểm tra to see which error IE is referring khổng lồ by checking for either 404 or 400 in the title bar.

404 errors received when opening link via Microsoft Office applications generate a The mạng internet site reports that the tòa tháp you requested could not be found (HTTP/1.0 404) message inside the MS Office program.

When Windows Update produces one, it appears as a code 0x80244019 or as the message WU_E_PT_HTTP_STATUS_NOT_FOUND.

Cause of HTTP 404 Errors

Technically, an Error 404 is a client-side error, implying that it"s your mistake, either because you typed the URL incorrectly or the page has been moved or removed from the website and you should have known.

Another possibility is if a trang web has moved a page or resource but did so without redirecting the old URL to the new one. When that happens, you'll receive a 404 error instead of being automatically routed to lớn the new page.

Microsoft IIS web servers sometimes give more specific information about the cause of 404 Not Found errors by suffixing a number after the 404, as in HTTP Error 404.3 - Not Found, which means MIME type restriction.

Retry the web page by pressing F5, clicking/tapping the refresh/reload button, or trying the URL from the address bar again.

The 404 Not Found error might appear for several reasons even though no real issue exists, so sometimes a simple refresh will often load the page you were looking for.

Check for errors in the URL. Often times this error appears because the URL was typed wrong or the link that was selected points khổng lồ the wrong URL.

Move up one directory level at a time in the URL until you find something.

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For example, if www.web.com/a/b/c.htm gave you the 404 Not Found error, move up khổng lồ www.web.com/a/b/. If you get nothing here (or an error), move up lớn www.web.com/a/. This should lead you toward what you're looking for or at least confirm that it's no longer available.

If you have moved all the way up lớn the website's home page, try to lớn run a search for the information you're looking for. If the site doesn't have a tìm kiếm function, try navigating to lớn the page you want using category liên kết to dig deeper into the site.

Search for the page from a popular search engine. It"s possible that you simply have the entirely wrong URL in which case a quick Google or Bing tìm kiếm should get you where you want to lớn go.

If you vày find the page you were after, update your bookmark or favorite lớn avoid the HTTP 404 error in the future.

Clear your browser"s cache if you have any indication that the 404 message might just be yours. For example, if you can reach the URL from your phone but not from your tablet, clearing the cache on your tablet"s browser might help.

You might also consider clearing your browser"s cookies or at least the one(s) involved with the website in question if clearing the cache didn"t work.

Change the DNS servers used by your computer, but usually only if an entire trang web is giving you a 404 error, especially if the website is available to lớn those on other networks (e.g., your sản phẩm điện thoại phone network or a friend in another city).

404s on an entire website isn"t particularly common unless your ISP or government filters/censors websites. No matter the reason, if it does happen, giving another set of DNS servers a try is a good step to take. See our không tính tiền and Public DNS Servers danh sách for some alternatives and instructions on doing this.

Contact the website directly. If they've removed the page you're after then the 404 error is completely legitimate & they should be able khổng lồ tell you that. If they've moved the page and are generating errors instead of redirecting visitors to lớn the new page, they'll be happy lớn hear from you so they can go fix it.

If you suspect that everyone is getting a 404 error for this site, but you"re not sure, a quick check on Twitter might help clear it up. All you have to bởi is tìm kiếm Twitter for #websitedown, as in #facebookdown or #youtubedown. Twitter users are usually the first khổng lồ start talking about a website outage. Learn how to lớn tell if a website is down for everyone or just you for some more help.

Finally, if all else fails, wait. No, it's not fun, but it might be your only course of action, especially if you're confident the 404 error shouldn't be happening (i.e., the page really should be at the URL you have và others are having the same problem & find it equally strange).

Errors Similar lớn Error 404

Some other client-side error messages related lớn the 404 Not Found error include 400 Bad Request, 401 Unauthorized, 403 Forbidden, and408 Request Timeout.

Several server-side HTTP status codes also exist, like the popular 500 Internal hệ thống Error. You can see all of them in our HTTP Status Code Errorslist.

Frequently Asked Questions

How do I fix error 404 messages on my website? If you’re aware of pages on your trang web with broken links, redirect or correct them. If a 404 error appears due khổng lồ a deleted page, consider restoring or redirecting it lớn new and related content.How bởi I fix error 404 on WordPress? If you use WordPress, 404 errors often pop up because of redirect conflicts or permalink issues. Fix broken liên kết for individual pages or posts. Visit the WordPress dashboard và update permalink settings if it's a site-wide problem.