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tech 22 May 2026

ShadowCat: File Transfer through QR Codes in a Browser

Discover ShadowCat, an innovative solution for file transfer through QR Codes directly in your browser. A simple, efficient, and fully offline method.

Article inspired by the original source
Show HN: ShadowCat – file transfer through QR Codes in a Browser ↗ github.com

Introduction to ShadowCat

In a world where file transfers are becoming increasingly complex, ShadowCat emerges as an innovative solution. This open-source project, available on GitHub, enables file transfers via QR Codes directly from a browser, without the need for an internet connection.

How It Works

ShadowCat uses a simple and effective method to encode files into a series of QR Codes. Here's how it works:

  1. Encoding: The file is converted into multiple QR Codes.
  2. Scanning: These QR Codes can be scanned by another device to retrieve the file.
  3. Reconstruction: The receiving device reconstructs the original file from the QR Codes.

This method is particularly useful in environments where internet connectivity is limited or unsecured.

Advantages of ShadowCat

  • Simplicity: No complex software or installation required.
  • Security: Transfers are done offline, minimizing interception risks.
  • Accessibility: Works on any device with a camera and a browser.

Use Cases

Consider a company needing to transfer sensitive files between two remote sites without a secure connection. ShadowCat offers a quick and secure solution. Additionally, developers can easily integrate this technology into their existing applications.

Key Figures

  • Fast Transfers: A 1 MB file can be transferred in just a few minutes.
  • Growing Adoption: Since its release, ShadowCat has been starred over 120 times on GitHub, demonstrating its growing interest.

Conclusion

ShadowCat is a practical and secure solution for file transfers, ideal for environments where internet connectivity is an issue. Whether you're a developer, entrepreneur, or tech decision-maker, this technology can transform the way you handle file transfers.

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ShadowCat transfert de fichiers QR Codes navigateur open source
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