Building a Key Overlay App with Codex

Title: Building a Key Overlay App with Codex

URL Source: https://medium.com/@hichengkang/building-a-key-overlay-app-with-codex-df2f779896e3?source=rss------python-5

Published Time: 2026-04-29T14:41:47Z

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# Building a Key Overlay App with Codex

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[ChengKang Tan](https://medium.com/@hichengkang?source=post_page---byline--df2f779896e3---------------------------------------)

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5 min read

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Apr 29, 2026

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A Small Python Project That Makes Typing Look Cool Sometimes, a small idea is enough to start a fun project.

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When I watch developers coding on YouTube or livestreams, I often notice one thing : their keyboard input is shown on the screen.

> It looks simple, but it also makes the screen feel more dynamic.

So I thought : _What if I build my own small key overlay program?_

That idea became **Key Stack Overlay**, a Python desktop utility that shows typed keys on the screen in real time.

The project is available on GitHub as `KeyOverlay_with_Codex`,