Create QR Codes

Build the payload envelope, then inspect the generated QR symbol immediately beside the inputs.

Payload Type ECC Level Version Mask

Generated QR

This preview reflects the selected payload, version, and ECC settings. Masking controls appear below the QR preview.

Download As

Mask Control

Mask Pattern Enable Mask

Current selection: Auto. Auto tests all eight masks and picks the lowest-penalty option. Disabling the mask is helpful when debugging bits, but the mask is required to ensure the QR is well-formed, readable, and decodable.

QR Diagram

Data, ECC, remainder, and bit numbers stay visible. Hover modules or labels to inspect their source.

Zoom 180%

Show labels Show values

Unmasked Masked

Debugger Analysis

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.

Analyze either the generated SVG preview or an uploaded PNG, JPEG, or SVG QR image.

Choose a debugger action to analyze the generated QR or an uploaded image.