How QR Code Decoding Works
QR code decoding is the process of converting the black-and-white matrix pattern in an image back to its original data. The entire decoding process runs locally in your browser — your image is never uploaded to any server, ensuring your privacy.
Image Capture
Acquire the image containing the QR code through file upload or clipboard paste.
Pattern Detection
Locate the QR code position and orientation using the three finder patterns in the corners.
Data Sampling
Sample each module (black/white cell) and convert the pattern into a binary data stream.
Error Correction
Use Reed-Solomon error correction codes to repair data errors caused by damage or blur, restoring the complete information.