Build the payload envelope, then inspect the generated QR symbol immediately beside the inputs.
This preview reflects the selected payload, version, and ECC settings. Masking controls appear below the QR preview.
Data, ECC, remainder, and bit numbers stay visible. Hover modules or labels to inspect their source.
Debug performs an internal virtual scan of the generated symbol, reconstructing format metadata, data bits, ECC bits, and remainder bits from the QR image itself.
Choose a debugger action to analyze the generated QR or an uploaded image.
