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Umbraco Cloud Logs Fail to Load Due to File Size

When Umbraco Cloud log files grow too large, the backoffice or cloud portal may time out and fail to render them. This article explains how to safely retrieve and view these massive log files locally.

Written by Joana Knobbe

Product: Umbraco Cloud Version: v7

Issue

When attempting to access or view system logs directly through the Umbraco Cloud portal or the backoffice Log Viewer, the system fails to load and throws a "Could not load Umbraco logs" error message. This typically occurs because the log file size exceeds the rendering or timeout thresholds of the web interface.

Solution

If your log files are too large to load in the browser, you can manually download and analyze them locally by following these steps:

  1. Access Kudu Power Tools: Log into your Umbraco Cloud portal, navigate to your environment, and open Kudu. For detailed guidance on accessing Kudu, refer to the Umbraco Cloud Power Tools Documentation.

  2. Locate the Log Files: Once inside the Kudu console, use the file explorer or command line to navigate to the following directory: D:\home\site\wwwroot\App_Data\Logs\

  3. Download the Logs: Download the relevant .txt or .log files for the dates you need to investigate directly to your local machine.

  4. View the Logs Locally: Because the files are large, standard text editors might lag. It is recommended to open them using:

    • A dedicated log viewer application (such as LogExpert or Windows Log Viewer).

    • A high-performance text editor capable of handling large files (such as Notepad++ or VS Code).

Article last update date: 16-06-2026

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