Document Scanner Online - Scan to PDF Instantly

Point your camera at a document. The scanner uses a 4-tier edge detection cascade (ML model, OpenCV, gradient-based) to find edges, corrects perspective, and enhances readability. Download as a clean PDF.

Yes, and a more private one. MiOffice processes everything in your browser — no app install, no account, and no files uploaded to a server.

Yes. Scan as many pages as you need, reorder them by dragging, then export as a single multi-page PDF.

Yes. The scanner uses your rear camera with auto-focus. On stability detection (document held steady for 1.5 seconds), it auto-captures with a countdown.

Auto (smart detection), Grayscale, Black & White (sharp text), Color (preserves original colors), and Whiteboard. Each runs a multi-stage pipeline for optimal results.

Yes. OpenCV perspective transform straightens skewed documents into a flat, rectangular scan — even if you shoot at an angle.

Yes. Upload photos from your gallery or drag and drop images. The same edge detection and enhancement pipeline applies.

DPI-aware PDF output. If your image has EXIF DPI data, the PDF respects native resolution. Otherwise it defaults to a high-quality scan suitable for printing.

Edge detection, perspective correction, and enhancement run in your browser; large captures may use a server fallback, with inputs and outputs deleted after processing (see /privacy).

PDF (single or multi-page), PNG, and JPEG. Multiple pages export as a PDF or a ZIP archive of images.