Invalid Notebook

[RobertBrown-II]

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When I tried to upload an .ipynb file it shows:
There was an error rendering your Notebook: the 'state' key is missing from 'metadata.widgets'. Add 'state' to each, or remove 'metadata.widgets'.
Using nbformat v5.10.4 and nbconvert v7.16.6

I see some solutions but those are complex procedure.

[Sudip-329]

Remove metadata.widgets

Open the .ipynb in a text editor.

Delete the entire "widgets" section under "metadata".

GitHub will render the notebook normally.

Pros: Simple, fast, works for any notebook.

Cons: Removes widget metadata (interactive widgets won’t work if reloaded elsewhere).

[RobertBrown-II]

But still this is a complex process

[Sudip-329]

Most Easy way: Clear all cell outputs

In Jupyter/Colab: Edit → Clear All Outputs.

Save and push.

GitHub can now render the notebook.

Pros: Works without touching metadata.

Cons: Viewers cannot see outputs unless they run the notebook.

[shivrajcodez]

This error happens because your notebook contains broken widget metadata. Specifically, metadata.widgets exists but the required state key is missing, and newer nbformat/nbconvert versions validate this strictly.

If you’re not using ipywidgets, the easiest fix is:

jupyter nbconvert --clear-output --inplace your_notebook.ipynb

Then try uploading again.

If it still fails, open the .ipynb file in a text editor and remove the entire "metadata.widgets" section. It’s safe to remove if you don’t need saved widget state.

That should resolve it without complex steps.