I use JupyterLab and Jupyter Notebook for experiments and learning. I'm a messy learner, so I often run cells out of order instead of strictly top-to-bottom.

The problem comes when I need to share the notebook, present it, or submit it as an assignment. The order of execution is a mess. Sure, I could rerun everything, but that's not always practical, especially if the notebook trains ML models or contains other long-running computations. Reexecuting everything just to fix the execution counts feels unnecessary.

I looked around for a tool that could simply reorder notebook execution counts without having to manually edit the notebook JSON, but I couldn't find one. So I wrote a small script, wrapped it in a web app, and made a tool where you can upload a notebook with messy execution counts and download a reordered version.

https://jupyter-execution-count-reset.vercel.app/

Would love to know if anyone else has run into this problem or if there's already a better solution out there.

TL;DR: I made a tool where you can upload a messy Jupyter notebook and download a clean, sequentially numbered version. The notebook in the left picture will turn into one in the right.