Document Scanner - Photo Perspective Correction & Deshading
Upload a photographed document, drag the four corners to fit the page edges, then auto-correct the perspective and deshade, boost contrast or binarise — all locally in your browser.
Click or drag to upload an image
Supports PNG / JPG / WebP / GIF and more
Tip
Upload a photographed document, drag the four corners to line up with the page edges, and the tool performs perspective correction, deshading and enhancement to output a neat black-and-white or colour scan — all processed locally in your browser with no uploads.
Features
Four-Corner Perspective Correction
Drag the four handles onto the page edges; any tilted shot is precisely projected into a straight rectangle via a homography, removing the keystone distortion.
Deshading & Illumination Normalisation
Estimates the background brightness with a heavy blur and normalises illumination, stripping uneven shadows and greyness so the page returns to a clean, even white.
B&W Scan & Colour Enhancement
Offers four levels — original, deshade, contrast boost and Otsu black-and-white binarisation — for a crisp scan-like result; the binary level suits pure-text documents.
Local Processing, No Uploads
Perspective correction and deshading run entirely with Canvas in your browser, so your document never leaves your device.
Steps
Upload a Document Photo
Click or drag in a photographed document image; even lighting and the whole page in frame help with corner picking.
Drag the Four Corners
Drag the four handles to align with the page edges, and hit reset corners to start over if needed.
Generate & Download
Choose a deshading level and output format, generate the scan, compare before and after, then download as PNG or JPG.