HCC2D Decoder
Decoding HCC2D and QR codes.
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
The new native C core is faster and supports 16-color HCC2D codes.
This app allows you to scan and decode HCC2D and QR code symbols using your mobile camera. It is based on advanced research in high-capacity barcode technologies and provides reliable decoding.
Key features:
* Decode HCC2D color codes.
* Full support for standard QR codes.
* Real-time scanning using the camera.
* Robust detection and error correction.
* No ads and no registration required.
HCC2D is a color two-dimensional code format that increases data capacity compared to traditional QR codes while preserving their structure. By using multiple colors, each module can encode more information, enabling higher data density in a compact symbol.
The app captures images, detects barcode regions, corrects perspective distortions, and analyzes color or intensity patterns to reconstruct the encoded data.
To transfer files from a desktop computer to your smartphone via a stream of HCC2D codes, use HCC2D Decoder together with the HCC2D Streamer desktop companion app.
Notes:
HCC2D codes can be created using the official online generator at hcc2d.com, the HCC2D Encoder application, the open-source CLI encoder, or the Debian/Ubuntu packages provided through the official HCC2D APT repository.
* Low-quality color printing may reduce decoding performance
* Best results are achieved with screen-displayed or high-quality printed codes and a high-resolution autofocus camera.
* One-dimensional barcodes are intentionally not supported.
References:
* Querini, M. (2026). HCC2D Code Specification — Version 0.9.0. Zenodo. https://doi.org/10.5281/zenodo.22206528. Licensed under the Creative Commons Attribution-NoDerivatives 4.0 International License (CC BY-ND 4.0).
* Querini, M. and Italiano, G. F. (2014). Reliability and Data Density in High Capacity Color Barcodes. Computer Science and Information Systems, 11(4), 1595-1615.
* Querini, M., Grillo, A., Lentini, A., and Italiano, G. F. (2011). 2D Color Barcodes for Mobile Phones. IJCSA, 8(1), 136-155.
* Querini, M. (2010). Analysis and Design of High-Capacity Two-Dimensional Codes. Development of the Reader for Desktop and Mobile Environments (Bilingual Digital Edition 2026, Version 1.0). Zenodo. https://doi.org/10.5281/zenodo.22206722
Notice:
This application is an independent personal project and is not affiliated with any organization or institution.
• New color classifier algorithms.
• Faster decoder core.
• Support for 16-color HCC2D codes.
• Improved display of Japanese and Chinese text in decoded results.
The developer, Marco Querini, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Marco Querini
- Size
- 7.8 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 4 more
- English, Italian, Japanese, Simplified Chinese, Spanish
- Age Rating
4+
- 4+
- Copyright
- © 2026 Marco Querini