Scanner.js: JavaScript Scan in Browsers: Chrome, Edge, Firefox & IE

Scan Documents from TWAIN WIA scanners in Browsers and Upload to Server (Java, C# ASP.NET, PHP, Python, Ruby)

Troubleshoot Scan App

Scan app diagnostics is a great way to check your scan app setup. It helps to identify the potential source of an issue and provides first steps to try and resolve it. Diagnostics will also help you get in touch with Asprise Support for further assistance.

Run Diagnostics

First, locate the scan app icon at the bottom right area of your screen (system tray/notification area). Right click on the scan app icon to bring up the menu and click 'Diagnostics' to launch scan app diagnostics.

Once the diagnostics dialog appears, you can click the 'Start' button to start the diagnostics process.

Fixing 'Failed to resolve:'

Cause of the error: 'Failed to resolve:' error can result if your computer is disconnected from the internet or one of your DNS servers doesn't function properly.

You may safely ignore this error if you only use scanner.js on non-secured HTTP (only on URLs starting with http://, not https://).


Add the a new entry to your hosts file:

  1. Press Win + X and click on Command Prompt (Admin)
  2. Run the following command in the command prompt:
    echo >> %SystemRoot%\System32\drivers\etc\hosts
  3. Optionally, verify the result by running the following command (check the last line of the output):
    type %SystemRoot%\System32\drivers\etc\hosts

For further assistance, please contact us at: (Please attach logs from Diagnostics.)

Read Developer's Guide

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