See Whatsapp images and videos without downloading

There could be multiple reasons why you don't want to download photos and videos in your mobile but want to view them.

For example,

1. lack of space
2. feel like spammed (like same images on festivals etc)
3. don't want to take headache of deleting after seeing them
4. restricted contents that you just want to see without storing in your mobile

There are two simple steps to achieve the freedom:

1. Switch off media auto-download in your Whatsapp app by going to Settings -> Data Usage
2. Use Whatsapp Web. Things opened in Web don't get downloaded in your mobile.

Note: This is how it is, at least, as of version 2.17.79.