qrkey is a versatile command-line tool designed specifically for generating and recovering QR codes from files, serving as a secure offline backup solution for private keys and other sensitive data.

Key Features

• File Conversion to QR Codes: Effortlessly transform files into PDF format embedded with QR codes. This process allows data to be printed or stored securely for future retrieval.
• Easy Recovery: Utilize a barcode scanner to recover data directly from the generated PDFs, ensuring a smooth and practical restoration of files. Additionally, recovery can be performed using files that contain lines representing the QR codes.
• Support for Large Files: When dealing with larger files, qrkey intelligently splits data into multiple QR codes, embedding necessary metadata to facilitate easy recovery and validation.

Usage Examples

To generate a QR code from a file, the following command can be utilized:

qrkey generate --in <file> --out file.pdf

To recover a file from QR codes, the command is as simple as:

qrkey recover --in <file.txt>

Alternatively, for an interactive recovery process:

qrkey recover

By leveraging qrkey, users can efficiently manage their sensitive data in a secure format, balancing practicality and security for offline backup needs.