What is Lottie?

Lottie is a JSON-based animation file format
Lottie is a lightweight format (than PNG and GIF) and suiting best for websites and apps.
Lottie is based on vector and not pixels so that means that users can scale the animations without
hurting the quality of the animation, and without increasing the size of the file.

Creating Lottie with After Effects

Before you starting to create your Lottie animation
Lottie does not support all features of Adobe After Effects

This link contains a list of features that Lottie supports and not in the different flatforms.
Our tip is to create the Lottie with the features that supported by all the flatforms
Plugins for exporting Lottie  from After-Effects.