The Ultimate Sidekick for GitHub Explorers!
Because life is too short to download every file just to see if it’s the right one.
Ever clicked on a .npy file on GitHub just to see a screen saying "View Raw"? Then you download it, open a Jupyter Notebook, run np.load(), and realize... it's the wrong file. 🤦♂️
Download a .zip file, extract it, and realize it’s either the wrong one—or that you only needed a single small part of the entire archive.
File Previewer is here to rescue your workflow. It injects a powerful preview engine directly into your GitHub Side Panel. Browse, Inspect, and Export without ever leaving the tab. It’s like giving GitHub a pair of X-ray glasses!
- Instant Inspection: View array data,
dtype, andshapeimmediately. - Conversion to text or JSON format: Copy or download the converted NumPy file in the desired format.
- Nested Magic: Browse ZIP files with a VS Code–like file explorer—no need to download or extract them.
- Selective View and Download: Open specific files within the zip directly in the previewer and donwload any file or folder.
- Export on the Fly: Found a CSV? Convert, preview and download it as a clean JSON with one click.
- Native Feel: It blends perfectly with GitHub's UI.
- Dark/Light/System Mode: Because we know you love your Dark Mode at 2 AM. 🦉
- Copy to Clipboard: Quickly grab data values.
Note:
- Please be patient while the file is being parsed, especially for large files. It may take a few seconds to load.
- This extension is currently in Beta and may have some quirks. Please report any issues you encounter!
The "Aha!" Moment
demo.mp4
A quick walkthrough of previewing files and switching themes.
| Feature | Description | Screenshot |
|---|---|---|
| Data Preview | See raw data in a structured, scrollable format. |  |
| ZIP Tree | Navigate through compressed files like a pro. |  |
| Theme Sync | Matches your GitHub theme. |  |
This extension uses a State-Driven Architecture:
- Detection: A background worker monitors your tab. If it sees GitHub, it "wakes up."
- Parsing: When an
.npy,.zipor.csvis detected, we fetch the binary stream and parse it on-the-fly usingnpyjsandjszip.
- Support for .parquet and .json file types.
- Data Visualization: Integrated Chart.js to plot Numpy arrays as heatmaps or line graphs. 📈
- Enhanced Metadata: Showing Repo name, branch, and owner in the panel header.
- Search: Filter through large CSV/Npy data instantly.
Hi there! 👋 This is my first-ever attempt at publishing a web extension. It’s been a journey of many late nights and "Why is this not working?!" moments.
Since the core source code is currently in a private repository for security and development reasons, this public repository is your home. Please use the Issues tab to:
- Report a bug (I promise I'll try to fix it!).
- Request a new file type support.
- Just share a suggestion or a virtual high-five!
Copyright © 2025 Jenil Prajapati — LinkedIn
- Software Status: This is a public issue tracker for a proprietary browser extension.
- License: All rights reserved. The compiled extension is provided "as-is" for personal use.
- Privacy: This extension never collects your data. All parsing happens locally in your browser.
Liked the tool? Give this repo a ⭐ to show your support!
Happy Coding! 🚀