Document Scanner
Turn a photo of a page into a clean scan: drag the four corners onto the paper, it is straightened flat and the background whitened. Auto, black and white, grey or colour.
or browse filesdrop an image here or paste
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Turn a photo of a page into a clean scan: drag the four corners onto the paper, it is straightened flat and the background whitened. Auto, black and white, grey or colour.
or browse filesdrop an image here or paste
Drag the four white handles onto the corners of the page. The dimmed part is cut away.
A phone photo of a page is skewed, shaded and grey; a scan is flat, white and crisp. This online document scanner gets from one to the other in two steps. First, drag the four corners onto the edges of the paper: the picture is straightened with a perspective correction so the page becomes a true rectangle, as if it had been laid on a scanner glass. Second, choose the look: Auto whitens the paper and deepens the ink while removing the shadows and colour cast of the photo, Black and white makes a pure two-tone scan for text and forms, Grey keeps the tones for pencil or photographs on the page, Colour keeps the colours and whitens the background, and None gives the straightened page untouched. Download the result at full resolution as a PNG or JPG. Everything runs in the browser and the photo is never uploaded.
A photographed page is never evenly lit: one side is brighter, a shadow falls from the hand or the phone, the paper reads grey rather than white. The scanner estimates the paper's own brightness at every point with a wide local average and divides the picture by it, so the paper comes out uniformly white wherever it was shaded and the ink, which is darker than the paper around it, stays dark. Black and white uses the same local estimate as an adaptive threshold - a pixel is ink when it is clearly darker than the paper around it - which is why a shadowed corner does not turn solid black as it would with a single global threshold. The Whitening slider sets how far a light grey is pushed to white; lower it for pencil notes or a faint print.
The four corners define a perspective transform; every pixel of the output is looked up in the photo through it, with bilinear sampling, so the straightened page is as sharp as the photo allows. The output size follows the longest edges of the quadrilateral you drew, so a page photographed at 3000 pixels across gives a scan close to 3000 pixels wide. To straighten a photograph or a whiteboard without the scan cleaning, the perspective crop tool does the correction alone; to correct converging verticals in a building photo, use the perspective tool.
The photo stays on your device; the straightening and the cleaning run in the browser and the download is built there too. There is no signup, no app, no watermark and no page limit - scan the next page by opening the next photo. For a two-tone conversion of any picture with a manual threshold, there is also the black and white converter.
Photograph the page, open the photo here, drag the corners onto the paper's edges and click Scan it. The page is straightened and whitened in the browser and downloaded as an image.
The scanner produces an image of each page - PNG or JPG. Most devices print or share an image as a PDF directly, and several pages can be combined in any PDF tool.
Raise the Whitening slider in the Auto or Colour look, or switch to Black and white for text. A very dark shadow across the page may need a second photo in better light.
No - you place the four corners yourself, which takes a few seconds and is exact. The dimmed area shows what will be cut away.
The size of the page as it appears in the photo. A page filling a 12-megapixel photo gives a scan of roughly 3000 by 4000 pixels, plenty for printing.
No. The photo never leaves your device; everything is computed in your browser.