Offline file transfer via animated QR codes

Your file

Drop a file here or browse files on your device Any file type · up to 500 MB · no uploads

Color mode two payloads per square

Four colors carry two payloads per square. Select four colors on the receiver too. Keep the color patches in view; start with a lower QR version.

Display size maximum width

Pixels per code.

QR size grid dimensions

Larger versions carry more data per code. Use a larger display size to keep them readable. Version 1 cannot fit a transfer header.

Error correction ECC level

Higher ECC can recover more damaged data, but fits fewer file bytes per code. Changing ECC starts a new transfer; reset the receiver.

Frame rate frames / second

Start at 15 or 30 FPS. Faster needs a matching screen and camera.

Codes per frame squares on screen

Settings are saved on this browser.

Select a file to prepare its QR codes

1 code / 30 FPS / 224 pxFrame 0000

Start the camera to begin receiving.

Scan FPS: 0.0; Camera images submitted to available workers per second
Decode FPS: 0.0; QR payloads decoded per second, including repeats
Goodput estimate: 0 B/s; Useful source bytes per active second. Verified file rate after completion.
Elapsed time: 00:00; Receiving time, excluding pauses
New / ignored: 0 / 0; Ignored includes repeats and symbols for completed blocks
Source symbols K: 0; Symbols needed before recovery overhead
Symbol bytes: 0 B; Useful payload bytes per QR, excluding header
Transfer size: 0 B; File envelope, including metadata

Camera delivered 0.0 FPS · Latest decoded capture 0 payloads so far · Recovered 0 B

Recovery progress 0 File Not detected

Receiver color mode

Camera resolution Camera FPS

Changing camera settings pauses capture and keeps recovery progress. Actual camera settings appear in debug mode.