Free Online Web TWAIN Document Scanner

1. Connect your scanner

Connect a scanner and install its driver. This demo also needs the Dynamic Web TWAIN local service.

Install the local service

Use the installer for your computer, then click Connect again. Scanning is available on desktop browsers.

Scanner

No physical scanner? Get a virtual scanner

Install a virtual scanner to scan sample images through the same scanning workflow.

Download virtual scanner — Windows x64

Windows installation guide

macOS / Linux and source code

These platforms require building and installing the virtual scanner from source.

Download source ZIP · View project on GitHub

macOS setup guide · Linux setup guide

Keep the Web TWAIN local service installed. After installing the virtual scanner, click Connect / refresh scanners, select the virtual device and scan.

2. Scan settings

Resolution Color mode Use document feeder Scan both sides (duplex) Show scanner driver settings

Feeder, duplex and resolution depend on your scanner. Enable driver settings if a device ignores these options.

Or add images from your computer

JPEG, PNG, BMP and TIFF. Connect the local service first; a scanner is not required to import images.

Your scanned pages will appear here.

Ready to connect. Your documents are processed locally and are not uploaded.

3. Preview & save