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End-User Guide

This article aims at guiding you, an end user of your company’s web app, to scan documents using Dynamic Web TWAIN.

Install Service

When you visit your company’s web app and want to scan for the first time, you may be prompted to install Dynamic Web TWAIN if your IT does not have it installed. Please download the service installer and install it on your device. It is needed to communicate between the scanners and the web app.

Service Installation Dialog:

service installation dialog

If you still see the dialog after installation, try enabling access to apps on your device and checking the list of possible reasons.

Allow Access to Local Apps

In latest browsers, you may need to grant access to apps on your device to make proper scanning.

When it is asking for permission, please click “Allow”.

permission dialog

If you accidentally block the access, you can reset it as shown in the following dialog.

site settings

The UI may vary according to different browsers and browser versions. The following shows the different UIs.

Chrome 145+
Chrome 142-144
Edge 145+
Edge 142-144
FireFox

Permission asking dialog:
Site settings:

Permission asking dialog:
Site settings:

Permission asking dialog:
Site settings:

Permission asking dialog:
Site settings:

Permission asking dialog:
Site settings:

Perform Scanning

Now, visit your app and try to scan documents. Here, we are using Dynamsoft’s online demo for illustration.

web demo

If it does not detect any scanners, make sure that you have installed the driver. You can find the driver from the scanner manufacturer’s support site.

Canon’s Driver Download Site (e.g.):

canon driver

Others

If you do not have the permission to make the changes, please contact your IT for help.

More resources:

Original post creation date: Feb 02, 2026

Last modified date: Feb 02, 2026