Hello - after not finding anything suitable online, I made an inkscape extension that allows you to interpolate shapes and groups of shapes!

I know that there are tons of dedicated animation apps on the net, but from my experience, they are not made for vector animations, generally extremely complex and not very intuitive. 

For example, with OpenToonz, to animate a vector character, I would need to make specific configurations, riggings, and deep changes to various UI, such as tables and schemas. 

For what I’m doing, I just don’t feel like I need something as powerful as OpenToonz. I wish I can just interact with the vector shapes in a simple manner like how I do in Inkscape. 

And so, I no-lifed this extension for over a week and its first version is ready. 

As you might of guess, this extension is mainly for helping with making vector-based animations.

The itch page is here: Inkscape Interpolation Tool by MagusCurt

Update: July 27th, 2025

I got rid of those annoying padded boxes that appears with each object created from the tool. I also made it so the resulting objects are created on the same layer as the one that's being interpolated. 

PLANNED Update:

Nothing to report today, but I did come up with more ideas to add and things that annoy me personally. 

I'm going to add a way to quickly add a row of frames that can be used later. Currently, it's very tedious to do it manually.

There's also the shape stroke issue that I haven't gotten to yet. After implementing the feature above I might get right to that. 

I think the extension is really cool!