DigitizerCamera lab On-device only

Scan your document.

One shot or a long receipt. Just start at the top.

Keep the paper in view

The camera detects the document and guides you when it needs more than one shot.

Photos stay in this tab until saved. Camera access needs trusted HTTPS.

Lab controls & diagnostics

Automatic length detection is a visual estimate. Optical flow tracks receipt features between frames in a local worker.

ML
Bottom edge
0/3 observations
Tracked features
0 (waiting)
Tracking
0 ms
Frame to tracking
0 ms
Analysis
0.0 fps
Sharpness
0
Brightness
0
Movement
0.0
Overlap
Uncertain

Up to 8 sections. Save before refreshing. Stitches correct shifts, small rotation and scale. Keep the phone parallel; perspective and curved paper are not corrected.