Customizing the 404 Error Page in Joomla 5

In the realm of web development, encountering a 404 error, commonly referred to as "Page Not Found," is a frequent occurrence. This error arises when a user attempts to access a non-existent page on your website. The default 404 error page provided by Joomla! can be quite generic and uninformative, potentially leading to a negative user experience. To address this issue, crafting a custom 404 error page is an excellent approach to enhance the user experience and maintain a positive brand image.

Joomla 5 offers two primary methods for creating a custom 404 error page: utilizing an article or employing a template override. Both approaches have their own strengths and weaknesses, making the choice dependent on your specific requirements and technical expertise.

Method 1: Creating a Custom 404 Error Page Using an Article

This method is relatively straightforward and requires minimal technical knowledge. It involves creating a new article in Joomla! and assigning it to serve as the 404 error page.

Step 1: Create a New Article

  • Access the Joomla! administration panel and navigate to Content > Article Manager.
  • Click on the Add New Article button to initiate the article creation process.

Step 2: Configure Article Details

  • Assign an appropriate title to the article, such as "Page Not Found" or "Oops, we couldn't find that page."
  • In the article content area, craft the message you want users to encounter when encountering the 404 error. Include clear and helpful information, and consider incorporating links to other relevant pages on your website.
  • Set the article status to Unpublished to prevent it from appearing in regular site navigation.

Step 3: Assign Article as 404 Error Page

  • Go to System > Style Templates and select the templates that you are using.
  • Update the error.php file to redirect 404 errors to your designated 404 article.
  • Modify the error.php file in the following manner: include the code below right after the 'restricted access' statement
    if (($this->error->getCode()) == '404') {
    	header('Location: ' . Jroute::_("index.php?option=com_content&view=article&id=45", false));
  • Click on the Save button to finalize the configuration.

Customizing the 404 Error Page in Joomla 5

Method 2: Creating a Custom 404 Error Page Using a Template Override

This method offers more control over the design and layout of the 404 error page but requires a higher level of technical proficiency. It involves overriding the default error.php file within your Joomla! template.

Step 1: Copy error.php File

  • Locate the error.php file within the templates/system directory of your Joomla! installation.
  • Copy the error.php file and paste it into your template's directory. The template directory typically resides in the templates folder.

Step 2: Modify error.php File

  • Open the copied error.php file in a code editor.
  • Locate the code block surrounding the default 404 error message.
  • Replace the default message with your custom HTML content, ensuring proper formatting and integration with your template's design.
  • Save the modified error.php file.

Step 3: Upload Modified error.php File

  • Upload the modified error.php file to your server, ensuring it replaces the original file in your template's directory.

Tips for Enhancing Your Custom 404 Error Page

  • Clarity and Conciseness: Craft a clear and concise message that effectively conveys the 404 error situation. Avoid lengthy explanations and focus on providing essential information.
  • Accessibility and Readability: Employ a user-friendly font and maintain adequate font size to ensure easy readability. Consider color contrast and overall visual accessibility.
  • Mobile-Friendliness: Adapt your custom 404 error page for optimal viewing on mobile devices. Ensure proper layout, font size, and touch responsiveness.
  • Branding Consistency: Integrate your branding elements, such as logos, color schemes, and typography, to maintain a consistent brand identity across your website.
  • Navigation Assistance: Provide links to relevant sections of your website, such as the homepage, search page, or contact page, to guide users back to your main content.


By implementing a custom 404 error page, you can transform an otherwise frustrating user experience into an opportunity to engage and retain visitors. By following the detailed steps outlined in this guide, you can effectively create a custom 404 error page that enhances your Joomla! website's