JupyterLab Hide Code

A JupyterLab extension to hide/show notebook inputs (permanently, without accidental uncollapse) with a Colab-like play button.

Features

1.- Show/Hide Code

Allows you to hide the code so it cannot be accidentally uncollapsed by clicking into the cell. You can do this by clicking the notebook toolbar button 'Show/Hide Code' or using the keyboard shortcut Ctrl+Shift+H (Windows/Linux) or Cmd+Shift+H (Mac).

Hidden cells stay locked even if you click into them—only the JupyterLab Hide Code shortcut/button changes their visibility, preventing accidental uncollapse while reading.

2.- Colab-like Run Button for Locked Cells

When a cell is hidden/locked, a small "play" button appears next to the cell's collapser. Clicking this button runs the cell in place without expanding it.

This feature is inspired by Google Colab's behavior, allowing users to execute code without revealing it. The regular cell execution methods (Shift+Enter, Run button) will still work as usual without expanding the cell.

Requirements

• JupyterLab >= 4.0.0

Install

To install the extension, execute:

pip install jl-hidecode

Uninstall

To remove the extension, execute:

pip uninstall jl-hidecode