404 Error
Definition
The 404 Error is a standard response code in the Hypertext Transfer Protocol (HTTP) that indicates that the server did not find the requested page. This error occurs when a user attempts to access a URL that doesn't exist on the server, whether due to a mistyped URL, a broken link, or content that has been moved or deleted.
In the context of user experience (UX), a 404 Error can significantly impact the user's journey. It can lead to frustration and confusion if the user is not given clear guidance on how to proceed. Therefore, designing an effective 404 page is crucial to maintaining a positive user experience.
Effective 404 pages typically include a friendly message explaining the error, suggestions for navigating back to the main site, and a search bar for users to find the content they were looking for. Additionally, they should maintain the site's branding to reassure users that they are still within the same website.
Expanded Definition
The 404 Error has been a part of the web since its early days, serving as a mechanism to inform users when a resource is unavailable. The importance of addressing 404 errors in UX design cannot be overstated, as users encountering these errors tend to leave the site quickly, which can lead to increased bounce rates and loss of potential customers.
Furthermore, analyzing 404 errors can provide valuable insights into site performance. By tracking which URLs frequently return 404 errors, webmasters can identify broken links, outdated content, or navigational issues that need to be addressed. This proactive approach not only improves the user experience but also enhances overall site usability.
Key Activities
Designing user-friendly 404 error pages.
Implementing redirects for moved or deleted content.
Monitoring and analyzing 404 error logs.
Creating a site map to help users navigate.
Testing links to ensure they lead to valid pages.
Benefits
Improved user experience by minimizing frustration.
Increased retention by guiding users to relevant content.
Better SEO performance through proper handling of errors.
Enhanced site credibility and trust with users.
Opportunity to gather insights on user behavior and site performance.
Example
A well-designed 404 page might feature a friendly message such as, "Oops! We can't seem to find the page you're looking for." It could also include links to popular articles, a search bar, and a button to return to the homepage. For instance, if a user clicks on a broken link from a search engine result, they would be greeted with this engaging 404 page instead of a standard error message, making it more likely they will stay on the site.
Use Cases
Websites with frequently changing content or structures.
E-commerce sites that may remove or relocate products.
Content-heavy sites that might have outdated links.
Blogs that undergo periodic redesigns or migrations.
Corporate sites needing to ensure customer trust and satisfaction.
Challenges & Limitations
Designing a 404 page that aligns with the overall site aesthetics.
Ensuring that all broken links are identified and fixed.
Balancing creativity with clarity in messaging.
Monitoring user interaction with the 404 page to improve it over time.
Tools & Methods
Google Search Console for monitoring 404 errors.
Analytics tools to track user behavior on 404 pages.
Content management systems (CMS) with built-in error handling.
Link checkers to identify broken links on the site.
User testing to evaluate the effectiveness of the 404 page design.
How to Cite "404 Error" - APA, MLA, and Chicago Citation Formats
UX Glossary. (2025, February 11, 2026). 404 Error. UX Glossary. https://www.uxglossary.com/glossary/404-error
Note: Access date is automatically set to today. Update if needed when using the citation.