Decoder is a GNOME application for scanning and generating QR codes. It provides a compact graphical interface for accessing information encoded in QR symbols without relying on a mobile phone or an online scanning service.
The program can scan codes through a connected camera or from a screenshot. It attempts to interpret recognised QR content so that the result is more useful than a sequence of raw characters.
Decoder also creates QR codes from information entered by the user. Its interface follows the conventions of modern GNOME applications, with an emphasis on providing the essential facilities without complicated configuration.
This is free and open source software.
Key Features
- Scan QR codes using a connected camera.
- Decode QR codes visible in screenshots.
- Generate new QR codes from supplied information.
- Display the contents of scanned QR codes.
- Interpret recognised QR content where possible.
- Keep a history of previously scanned QR codes.
- Maintain a record of generated QR codes.
- Revisit previously processed codes without scanning them again.
- Provide a graphical workflow for moving between scanning and generation.
- Integrate with the GNOME desktop environment.
- Use an adaptive interface suitable for different window sizes.
- Support Linux desktop camera integration.
- Provide a straightforward alternative to browser-based QR code utilities.
Website: apps.gnome.org/Decoder
Support:
Developer: Bilal Elmoussaoui, Maximiliano Sandoval and contributors
License: GNU General Public License v3.0

Decoder is written in Rust. Learn Rust with our recommended free books and free tutorials.
Related Software
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|---|---|
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| Decoder | Fancy yet simple QR Codes scanner and generator |
| qrtool | Encode and decode QR code |
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| libqrencode | Encoding data in a QR Code symbol |
| ClipQR | Scan QR codes on screen and from camera |
| Qrca | QR code scanner for Plasma Mobile |
| qr-rs | Encode URLs or text into QR codes |
| segno | Python library and CLI tool for generating QR Codes and Micro QR Codes |
| AR Tag | Minimalist image editor |
Read our verdict in the software roundup.
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