pdfcosmos

Scan to PDF

Photograph your pages, crop and straighten them, and combine them into one PDF.

Free, fast, and privacy-first.

Scan a page to begin

Photograph pages with your camera, or choose photos you already took.

Your camera is used only to capture pages on this device. Photos never leave your browser.

Up to 50 pages

Scan documents to PDF, free, in your browser

Turn paper into a clean PDF with your phone: photograph each page, crop and straighten it, and combine the pages into one document you can email or print. Scan to PDF runs entirely on your device. Your photos are never uploaded, so private paperwork stays private.

Trim each page with a familiar crop box (resize from any corner or pull in a single edge), and for photos taken at an angle, switch on Straighten corners to flatten the page square, with an optional high-contrast grayscale look that reads like a real scan. No camera? Choose photos you already took and Scan to PDF crops and combines them the same way.

  • Camera or photo picker

    Capture pages live, or select images you already have. Both feed the same crop-and-combine flow.

  • Crop and straighten

    A familiar 8-handle crop box, plus a Straighten-corners mode that deskews angled photos like a scanner app.

  • Nothing is uploaded

    Frames go from the camera to a PDF entirely in your browser and are never sent to a server.

  • One PDF, or a ZIP

    Up to 50 pages combined into a single PDF, or one PDF per page downloaded together as a ZIP.

How to scan a document to PDF

  1. Open the camera or choose photos

    Tap “Use camera” to photograph a page with your phone, or “Choose photos” to pick pictures you already took. On a device without a camera, the photo picker is used automatically.

  2. Crop and straighten

    Drag the crop box (or any of its eight handles) around the part to keep. Corners resize it, edge handles pull in one side. For a photo taken at an angle, switch on “Straighten corners” and place the four corners on the document. You can also rotate the photo or apply a grayscale “document” look.

  3. Add pages and create the PDF

    Add each page to the list, reorder or remove any you don’t want, then click “Create PDF” to combine them. Everything happens in your browser.

Frequently asked questions

Are my photos uploaded to a server?
No. The camera frames and photos are processed entirely in your browser (cropped with canvas and assembled into a PDF with pdf-lib) and never leave your device. You can confirm it by opening your browser's Network tab while scanning: no image data is sent.
Does it work on a laptop or desktop?
Yes. If your device has a camera you can capture directly. If it doesn't, or you block camera access, Scan to PDF falls back to choosing image files from your device and runs the same crop-and-combine steps.
Why does it ask for camera permission?
Only so it can show the live preview and capture a frame. The camera is enabled for this page alone. If you decline, nothing breaks: you can still add pages by choosing photos from your device.
How does the crop and straighten work?
By default you get a crop box like a photo editor: drag a corner to resize it, drag an edge handle to pull in one side, or drag inside the box to move it. For a page photographed at an angle, turn on “Straighten corners”. The four corners move freely, and Scan to PDF applies a perspective transform that flattens the page straight, the “deskew” a real scanner does.
Can I scan more than one page?
Yes. The camera stays open. Capture a page, crop it, add it, and the preview returns for the next one. Remove pages you don't want before finishing. By default all pages combine into one PDF. Switch on “One PDF per page” to get each page as its own PDF, downloaded together as a single ZIP. Up to 50 pages.
Is Scan to PDF free?
Yes, it's completely free to use, with no sign-up and nothing to install.