Zoomable Image in Flutter
A dart+flutter package for panning and zooming images by touch.
Getting Started
// You can use any ImageProvider, including NetworkImage and FileImage. new ZoomableImage(new AssetImage('images/squirrel.jpg'), scale: 16.0)
That’s all you need. See below and example/
 for squirrels.

Credit
This is developed by perlatus
Download this project from the below link.
https://github.com/perlatus/flutter_zoomable_image/archive/refs/heads/master.zip
You can visit original source page from the below link:
https://github.com/perlatus/flutter_zoomable_image