Table Of Contents
Introduction
Have you ever clicked on a link and been greeted by a strange message saying “404 Not Found”? If yes, you have experienced one of the most common errors on the internet. It can be frustrating when you are trying to find information and the page simply refuses to load. But what exactly is a 404 error, and why does it happen?
In this article, we will break down everything you need to know about 404 errors – what they mean, why they happen, how they affect your website’s performance in search engines, and most importantly, how you can fix them. Whether you are a website owner, a blogger, or just a curious internet user, this guide is written in simple language that anyone can understand.
What Is a 404 Error?
A 404 error is an HTTP status code that means the server could not find the page you were looking for. In plain terms, it means: “The page you requested does not exist here.”
When you type a web address (URL) into your browser, your browser sends a request to the website’s server, asking it to deliver the page. If the server cannot find that specific page, it sends back a response code – and that code is 404.
Think of it like going to a library and asking for a specific book by its shelf number. If the book is missing, misplaced, or never existed in that location, the librarian would tell you it cannot be found. A 404 error is essentially the internet’s way of saying the same thing.
The Full Meaning of “404”
The “404” part is a status code that comes from the HTTP protocol – the system that governs how data is transferred on the web. HTTP (HyperText Transfer Protocol) uses numerical codes to communicate the result of a request between a browser and a server.
Here is a simple breakdown of how HTTP status codes are categorized:
- 1xx codes – Informational responses (the request is being processed)
- 2xx codes – Success responses (the request worked, e.g., 200 OK)
- 3xx codes – Redirection responses (the page has moved)
- 4xx codes – Client error responses (something went wrong on the user’s end)
- 5xx codes – Server error responses (something went wrong on the server’s end)
So, 404 falls in the 4xx category, which means the problem originates from the client side – usually because the URL requested simply does not point to any real page on the server.
What Does a 404 Page Look Like?
The appearance of a 404 page varies from website to website. Some websites display a plain, technical white page with the words “404 Not Found.” Others, especially well-designed websites, show a custom and visually appealing error page with helpful messages, suggestions, or a search box.
For example, large companies like GitHub, Pixar, and Airbnb have famously creative 404 pages with fun illustrations and witty messages. While the user experience varies, the underlying meaning is always the same: the page requested could not be found.
Common Causes of a 404 Error
There are several reasons why a 404 error can occur. Understanding these causes is the first step toward preventing and fixing them. Let us go through each one in detail.
1. The Page Has Been Deleted
This is one of the most frequent causes of 404 errors. When a website owner or administrator deletes a page from their site – intentionally or accidentally – the URL that used to point to that page no longer has any destination. Anyone who tries to access it, whether by clicking an old link or typing the URL directly, will land on a 404 error.
This often happens with old blog posts, outdated product pages, or content that is no longer relevant. If the deletion is not accompanied by a proper redirect, the 404 error becomes permanent.
2. The URL Has Been Changed or Renamed
When a page’s web address is updated – for example, when a blog post title is changed or a URL is restructured – the old URL becomes invalid. If someone accesses the old link without any redirection in place, they will see a 404 error.
Imagine a page used to be at “www.example.com/old-article” and it is now at “www.example.com/new-article.” Without telling the server to redirect users from the old address to the new one, anyone who visits the old link will be met with a 404.
3. Typing a Wrong URL
Sometimes the problem is as simple as a typo. When a user manually types a URL into their browser and makes a spelling mistake or forgets part of the address, the browser sends a request for a page that does not exist – resulting in a 404 error.
For example, typing “www.example.com/cotact-us” instead of “www.example.com/contact-us” would result in a 404 because the misspelled version does not match any page on the server.
4. A Broken or Outdated Hyperlink
Broken links are a very common source of 404 errors. These are links that used to point to a valid page but no longer do – either because the destination page was deleted, moved, or its URL was changed. Broken links can exist on your own website or on external websites that link to your pages.
For instance, if another blog linked to one of your articles three years ago, and you have since deleted that article, anyone clicking that external link today will encounter a 404 error.
5. Domain or Website Migration
When a website moves to a new domain or undergoes a major restructuring – such as changing from “http” to “https” or reorganizing the entire URL structure – many existing URLs can break if the migration is not handled carefully. Each old URL that does not have a corresponding redirect will produce a 404 error.
6. Server Misconfiguration
Sometimes, even when a page exists, it can produce a 404 error due to improper server settings. This can happen when files are placed in the wrong directory, permissions are set incorrectly, or the server’s configuration file (such as an .htaccess file in Apache servers) has errors.
7. Issues With Dynamic URLs
Dynamic websites generate pages based on user input or database queries. If a specific product ID, user profile, or article ID is removed from the database, the URL that used to generate that page will no longer work and will throw a 404 error. E-commerce websites with frequently updated product catalogs are especially prone to this.
Soft 404 Errors: A Special Case
Not all 404 errors are “hard” errors. There is a category called soft 404 errors, and these are particularly tricky because they do not send an actual 404 HTTP response code. Instead, the server returns a 200 OK response (meaning everything is fine), but the page’s content essentially says the content is missing or unavailable.
Google’s search engine crawlers are smart enough to detect these soft 404s. Common examples include pages that say “Product is out of stock and no longer available,” pages with very thin or no content, or search result pages that return no results but still display with a 200 status code.
Soft 404s are dangerous from an SEO perspective because search engines may waste their crawl budget on these low-value pages, and the pages may still appear in search results even though they offer no real value to users.
How 404 Errors Impact SEO
Search Engine Optimization (SEO) is the practice of making your website rank higher in search results. 404 errors can have a significant impact on your SEO if left unchecked. Here is a detailed look at how 404 errors affect your website’s search engine performance.
1. Loss of Link Equity (Link Juice)
When other websites link to your pages, those links pass something called “link equity” or “link juice” to your site. This is an important ranking factor – the more quality links you have pointing to your pages, the better your chances of ranking well in search results.
When a page that has received inbound links returns a 404 error, all of that valuable link equity is lost. The links still exist on external websites, but they no longer deliver any SEO benefit to your site because there is no living page to receive that value.
2. Wasted Crawl Budget
Search engine bots like Googlebot regularly crawl websites to discover and index pages. Every website has a crawl budget – a limit to how many pages the bot will crawl in a given period. If your website has many 404 pages, the bot wastes part of its crawl budget trying to access those non-existent pages instead of crawling and indexing your valid, important content.
For large websites with thousands of pages, this can be a serious issue. Search engines may miss crawling your newest and most important content because they are spending time on dead URLs.
3. Negative User Experience
Search engines like Google pay close attention to user experience signals. When users visit your site and encounter 404 errors, they often leave the site immediately – a behavior known as “bouncing.” A high bounce rate combined with a low time-on-site signals to search engines that your website is not providing good value to visitors.
While Google has clarified that 404 errors themselves do not directly penalize your rankings, the poor user experience they create can indirectly harm your website’s performance in search results.
4. Loss of Indexed Pages
If a page that was previously indexed by Google starts returning 404 errors, Google will eventually remove it from its index. This means that page will no longer appear in search results at all – and any organic traffic it was generating will disappear.
Google does give a grace period before permanently deindexing a 404 page, in case the error is temporary. But if the error persists, the page will eventually be dropped from the index.
5. Impact on Internal Linking
Internal links – links within your own website that connect one page to another – are essential for SEO. They help search engines understand your site’s structure and help users navigate between related content. If any of your internal links point to pages that return 404 errors, those links are broken and the navigation chain is disrupted, both for users and search engine bots.
The Difference Between 404 and Other Similar Errors
It helps to understand how a 404 error differs from other related HTTP error codes, since they are sometimes confused.
404 vs. 301 Redirect
A 301 redirect means a page has permanently moved to a new URL. When properly set up, users and search engines are automatically taken to the new location. A 404 error means no such redirection is in place – the page is simply gone with no forwarding address.
404 vs. 410 Gone
A 410 error means the page is permanently gone and will not be coming back – it is a more definitive version of a 404. Search engines tend to deindex 410 pages faster than 404 pages. If you intentionally delete a page permanently with no plans to restore it, a 410 response is actually more appropriate and cleaner from an SEO standpoint.
404 vs. 403 Forbidden
A 403 error means the page exists but the user does not have permission to view it. A 404 error means the page does not exist at all (or the server is configured to hide its existence). They are very different situations even though both start with “4”.
404 vs. 500 Internal Server Error
A 500 error is a server-side problem – something went wrong internally with the web server and it could not process the request. A 404 error is a client-side issue, meaning the URL being requested simply does not correspond to any content on the server.
How to Find 404 Errors on Your Website
Before you can fix 404 errors, you need to find them. Here are the most effective and beginner-friendly methods for discovering 404 errors on your website.
1. Google Search Console
Google Search Console is a free tool provided by Google that gives website owners insight into how their site performs in search results. It has a dedicated “Coverage” or “Pages” report that highlights pages returning 404 errors, including both errors found during crawling and those detected from sitemaps.
To find 404 errors: log into Google Search Console, navigate to “Indexing” in the left panel, click on “Pages,” and then look at the “Not indexed” tab. Filter by “Not found (404)” to see a list of all affected URLs.
2. Website Crawl Tools
SEO tools such as Screaming Frog SEO Spider, Ahrefs Site Audit, and SEMrush Site Audit can crawl your entire website and generate a detailed report of all 404 errors, broken links, and other issues. These tools are highly effective and allow you to see the exact pages and links that are causing problems.
Screaming Frog has a free version that can crawl up to 500 URLs, which is a great starting point for small to medium-sized websites.
3. Server Log Files
Your web server maintains log files that record every request made to your site, along with the response code returned. By analyzing these log files, you can identify every URL that is returning a 404 error, including requests that might not be detected by crawl tools or search consoles. Tools like GoAccess or AWStats can help parse and visualize these logs.
4. Manual Checking
For smaller websites, you can manually click through your links to check for 404 errors. Browser extensions like “Check My Links” for Google Chrome can automatically highlight all broken links on a page, saving you time during manual audits.
How to Fix 404 Errors: Easy Solutions Explained
Now that you know how to find 404 errors, let us talk about the most effective ways to fix them. The right solution depends on the cause of the error.
Fix 1: Set Up 301 Redirects
This is by far the most important and widely used fix for 404 errors. A 301 redirect permanently forwards users and search engines from an old, broken URL to a new, working URL. When properly configured, anyone who visits the old link is automatically sent to the correct page without even noticing.
For example, if you deleted a page at “/old-page” but have a very similar page at “/new-page,” you should set up a 301 redirect from the old URL to the new one. This preserves the link equity from any external sites linking to the old URL.
How to set up a 301 redirect depends on your website platform:
- WordPress: Use a plugin like Rank Math, Yoast SEO, or Redirection to add redirects easily without touching code
- Apache servers: Add redirect rules to your .htaccess file
- Nginx servers: Add redirect rules to your server configuration file
- Shopify, Wix, Squarespace: Each platform has a built-in URL redirect feature in the admin settings
Fix 2: Restore the Deleted Page
If the 404 error was caused by accidentally deleting a page, the simplest fix is to restore it. Most content management systems (CMS) like WordPress store deleted content in a trash or recycle bin for a period of time before permanently deleting it. If the page is still in the trash, you can restore it with a single click.
If the page has been permanently deleted, you may be able to recover it from your website’s backup, or you may need to recreate the content from scratch using tools like the Wayback Machine (web.archive.org) to recover the original content.
Fix 3: Correct the URL
If the 404 error is caused by a typo in a link – either on your website or in content you control – simply correcting the URL in the link is the fastest fix. Go to the source of the broken link, find the incorrect URL, and update it to the correct one.
For internal links, this is straightforward since you have access to your own content. For external links on other websites, you would need to contact the website owner and politely request a link correction.
Fix 4: Create a Custom 404 Page
While a custom 404 page does not technically “fix” the error, it dramatically improves the user experience when someone does land on a missing page. Instead of showing a cold, generic error message, a well-designed custom 404 page can:
- Acknowledge the error in a friendly, helpful tone
- Offer links to popular or related pages on your site
- Include a search bar so users can search for what they were looking for
- Provide a link back to the homepage
- Display your contact information in case users need help
A great custom 404 page can retain visitors who might otherwise leave your site entirely, turning a frustrating dead end into an opportunity to keep the user engaged.
Fix 5: Update Your Sitemap
Your XML sitemap is a file that lists all of the important pages on your website and helps search engines discover and crawl them. If your sitemap includes URLs that return 404 errors, search engines will waste crawl budget on those dead URLs.
Regularly audit your sitemap and remove any URLs that no longer exist. Submit the updated sitemap to Google Search Console to help Google quickly discover the changes.
Fix 6: Fix Server Configuration Issues
If the 404 errors are caused by server misconfiguration, you will need to correct the server settings. This might involve checking your .htaccess file for errors (on Apache servers), verifying file and folder permissions, or ensuring that files are in the correct directories.
If you are not technically experienced, it is advisable to contact your web hosting provider’s support team, as they can help diagnose and resolve server-level configuration issues.
Best Practices to Prevent 404 Errors
Prevention is always better than cure. Here are some practical habits and strategies to minimize the occurrence of 404 errors on your website.
Always Set Up Redirects Before Deleting or Moving Pages
Before you delete a page or change its URL, always plan and implement a redirect. This single habit can prevent the vast majority of 404 errors. Identify where the page’s visitors should go after the change – either a closely related page or the homepage – and set up the 301 redirect in advance.
Conduct Regular Link Audits
Schedule regular audits of your website’s internal and external links using tools like Screaming Frog or Ahrefs. Aim to audit at least once per quarter, or more frequently if your site undergoes regular changes. Catching broken links early prevents 404 errors from accumulating and affecting your SEO.
Keep Your Sitemap Updated
Every time you add, remove, or move a page, update your sitemap accordingly. Many CMS platforms and SEO plugins can automatically update your sitemap, but it is still good practice to verify it manually after significant website changes.
Monitor Google Search Console Regularly
Set aside time each week or month to check your Google Search Console for new 404 errors. The tool provides a timely alert system for crawl errors, allowing you to address issues before they negatively impact your rankings.
Be Careful With Website Migrations
Website migrations – moving to a new domain, switching from HTTP to HTTPS, or restructuring URL patterns – are high-risk events for 404 errors. Always create a comprehensive redirect mapping before executing a migration. Test all redirects on a staging environment before going live, and monitor closely in the days and weeks following the migration.
Double-Check Links Before Publishing
Before publishing any new content, check that all links within the content – both internal and external – are working correctly. A simple proofread that includes clicking each link can prevent embarrassing broken links from going live.
404 Errors From the User’s Perspective
It is also useful to understand 404 errors from the perspective of an everyday internet user, not just a website owner. If you encounter a 404 page while browsing the web, here are a few things you can try:
- Check the URL for typos – Look at the web address you typed or that was linked to. A small spelling error could be the entire cause of the problem.
- Refresh the page – Occasionally, 404 errors are temporary. A quick refresh might load the page if the error was due to a brief server issue.
- Navigate to the homepage – Go to the website’s homepage and use the navigation or search bar to find the content you were looking for.
- Try a search engine – Search for the topic or page title using Google. If the page has moved to a new URL, the updated link may appear in search results.
- Use the Wayback Machine – Visit web.archive.org and enter the URL to see if a cached version of the page was saved. This can help you recover content from pages that no longer exist.
- Clear browser cache – Sometimes your browser stores old data that causes issues. Clearing the cache and trying again may resolve the problem.
Understanding When 404 Errors Are Acceptable
Not every 404 error needs to be fixed. Google has explicitly stated that not all 404 errors are bad. Sometimes a 404 response is the correct and appropriate response. Here are situations where 404 errors are perfectly acceptable:
- A page was intentionally removed and there is no relevant replacement page to redirect to
- External websites link to pages on your site that you never created – spammers and bots sometimes generate these types of links
- URLs with random strings or parameters generated by bots or scrapers – these are not real pages and do not need to be addressed
The key is to focus your attention on 404 errors that affect pages that were previously indexed by search engines, that received significant traffic, or that are linked to from important internal or external pages. Those are the ones worth fixing promptly.
Tools to Help You Manage 404 Errors
Managing 404 errors effectively is much easier with the right tools. Here is a summary of the most helpful tools available, many of which have free options:
Google Search Console (Free)
Essential for any website owner. Provides a clear view of all 404 errors Google has detected while crawling your website, along with the pages that link to those broken URLs.
Screaming Frog SEO Spider (Free up to 500 URLs)
A powerful desktop tool that crawls your website and provides a comprehensive list of all broken links, 404 errors, redirect chains, and other SEO issues.
Ahrefs Site Audit (Paid)
A professional SEO platform that includes a thorough site audit feature. It identifies 404 errors, broken backlinks, and provides detailed insights into how to fix each issue.
Semrush Site Audit (Free & Paid)
Another popular SEO suite that audits your website for 404 errors and other technical issues. It offers a free tier that is useful for smaller websites.
Redirection Plugin for WordPress (Free)
A WordPress plugin that allows you to easily manage 301 redirects and monitor 404 errors directly from your WordPress dashboard – no coding required.
Broken Link Checker (Free, WordPress Plugin)
This plugin automatically scans your WordPress website for broken links and missing images, sending you alerts when it finds issues so you can fix them promptly.
Conclusion
A 404 error is one of the internet’s most common and easily misunderstood experiences. At its core, it is simply the web’s way of telling you that a page you are looking for cannot be found. But for website owners, 404 errors are far more than a minor inconvenience – they can quietly erode SEO performance, waste valuable crawl budget, damage user experience, and cause the loss of important link equity built up over time.
The good news is that 404 errors are entirely manageable. By understanding what causes them, knowing how to find them using tools like Google Search Console and Screaming Frog, and applying the right fixes – particularly 301 redirects – you can keep your website healthy, your visitors happy, and your search rankings strong.
Make it a habit to regularly audit your website for broken links and dead pages. Build a culture of checking links before you publish content and always setting up redirects before deleting or moving pages. These simple practices, applied consistently, will save you from the headaches of accumulating 404 errors and the SEO damage they bring.
Remember, a great website is not just about having excellent content – it is also about making sure every page is accessible, every link works, and every user who visits has a smooth and positive experience from start to finish.
About the Author
Jay Patel is the Founder of XSquareSEO, a full-service SEO agency with experience in on-page SEO, eCommerce SEO, link building, technical SEO, SaaS SEO, and local SEO. For more information, feel free to contact us.
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