--- title: "Error pages" slug: "error-pages" description: "Customize and style the static web pages that appear in your Knowledge base site. We provide both basic and custom style options" tags: ["Customize site", "Error pages"] status: "update" updated: 2026-07-20T09:23:15Z published: 2026-07-20T09:23:22Z canonical: "docs.document360.com/error-pages" --- > ## Documentation Index > Fetch the complete documentation index at: https://docs.document360.com/llms.txt > Use this file to discover all available pages before exploring further. # Error pages Error pages are fallback pages that appear when a reader encounters a broken, restricted, or unauthorized URL on your knowledge base site. Instead of showing a generic browser error, Document360 lets you display a branded, informative page that guides readers to the right place with clear next steps. Document360 supports four error pages, each triggered by a specific situation: | Error page | When it appears | | --- | --- | | **404** | A reader tries to access a URL that does not exist - for example, a deleted or broken link | | **Access denied** | A reader is logged in but does not have permission to view specific content | | **Unauthorized** | A reader is not authenticated - they are not logged in or their session has expired - and attempts to access a private or restricted page | | **IP restriction** | A reader tries to access the knowledge base from an IP address that is outside the allowed range | NOTE Once you configure a custom error page, you cannot revert to the default static page. It is recommended to create custom error pages to enhance the reader experience. --- ## When to customize error pages Customize your error pages when you want readers to have a consistent, branded experience regardless of how they arrived at a dead end. Common situations where this matters: - You have recently restructured content, deleted articles, or changed slugs — readers may hit 404s from bookmarks or external links. - Your knowledge base uses Private or Mixed access — readers will encounter the Access denied or Unauthorized pages when they lack the right permissions or are not logged in. - You have IP restrictions configured — readers outside the allowed range will see the IP restriction page and need clear guidance on what to do next. - You want all error states to reflect your brand rather than showing a generic browser error to your readers. --- ## Access error page settings 1. Navigate to **Settings** () > **Knowledge base site** in the left navigation bar of the Knowledge base portal. 2. In the left navigation pane, navigate to **Site customization**. 3. Click the **Customize site** button. ![Site customization page showing the Customize site button](https://cdn.document360.io/860f9f88-412e-4570-8222-d5bf2f4b7dd1/Images/Documentation/Site%20customization%20-%201st%20page.png) 1. From the left dropdown, select the desired error page — **404**, **Access denied**, **Unauthorized**, or **IP restriction**. 2. Customize using **Basic style** or **Custom style**. For detailed steps, see [404 page](https://docs.document360.com/docs/en/404-page), [Access denied page](https://docs.document360.com/docs/en/access-denied-page), [Unauthorized page](https://docs.document360.com/docs/en/unauthorized-page), or [IP restriction page](https://docs.document360.com/docs/en/ip-restriction-page). ![Customize site builder showing the 404 error page design panel with Basic style and Custom style options](https://cdn.document360.io/860f9f88-412e-4570-8222-d5bf2f4b7dd1/Images/Documentation/Site%20customization%20-%20404%20error%20page.png) --- ## Save and publish - Use the **Preview** toggle on the right to review your changes. - Click **Save** to save your changes. - Click **Publish** to make changes live. --- ## FAQ **Can I upload images from my local storage for error page design?** Yes. You can import images from your Drive or local storage when customizing any error page. **Why are the Access denied and Unauthorized error pages unavailable for my project?** These error pages are only available for Private or Mixed access projects. If your knowledge base is public, these pages will not be shown to readers and cannot be configured. **Can I add video or GIF elements to the error page design?** Yes. You can add screen GIFs and video elements to the error page design using the Custom style option. **Is it possible to switch back to the default static page after configuring an error page?** No. Once you configure a custom error page, you cannot revert to the default static page. ## Related - [Customizing 404 page](/404-page.md) - [Customizing Access denied page](/access-denied-page.md) - [Customizing Unauthorized page](/unauthorized-page.md) - [Customizing IP restriction page](/ip-restriction-page.md)