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Document Scanner Beta
Point your camera at a page and it finds the edges automatically, straightens the perspective, and snaps a clean scan — like a hardware scanner in your pocket. Capture as many pages as you need, drop the bad ones, pick a filter, then download one tidy PDF. Everything happens in this tab; no photo is ever uploaded.
Beta: edge-detection and de-skew can still be unreliable depending on your device, camera and lighting. It works, but expect rough results in some conditions — improvements are on the way.
Looking for a page…
How the scan works
It finds the page, you don't. Each camera frame is edge-detected (Canny) and searched for the largest four-cornered shape — the page. A live outline tracks it; hold steady and it auto-captures, or tap the shutter yourself.
Shot at an angle? Fixed. The four detected corners drive a perspective transform that flattens the page into a straight-on rectangle, cropping away the desk behind it — the same de-skew a real scanner does.
Scanner filters. Per page, choose Color, Grayscale, or high-contrast B&W (adaptive threshold) so text pages come out crisp and printable. Reorder or delete any page before exporting.
Stays on your device. The camera feed is processed frame-by-frame in this tab and the PDF is built locally with pdf-lib — no frame, photo, or page is ever uploaded. Needs a camera and a secure (https) page; works best on a phone. The edge-detection engine (OpenCV.js, ~11 MB) loads once when you start the camera.