What makes this a real PDF scanner (not a "convert image to PDF")
A lot of "pdf scanner online" tools are actually just image-to-PDF converters — they take a photo you already have, drop it into a PDF, and call it a scan. This one does the actual scanner work: live camera capture at up to 4K, automatic document edge detection, perspective correction (so a shot taken at an angle comes out flat), and a document filter to boost contrast and clean up shadows the way CamScanner or Adobe Scan does. The output is genuinely scanner-quality, not just a photo in a PDF wrapper.
If you already have clean photos and only need to bundle them into a PDF, use our image-to-PDF tool — it skips the scanner processing and is faster for that use case. If you have a paper document in front of you right now, this page is what you want.
PDF scanner for iPhone and Android — no app to install
Open scanpdfonline.com/pdf-scanner in Safari (iPhone/iPad) or Chrome (Android), tap Use camera, and allow browser camera access. Hold the phone flat over the page, and the scanner captures at your camera's full resolution. iOS 14.5+ exposes the sharpest results because Safari serves the full-resolution image APIs; recent Android flagships hit 4K, older devices step down cleanly to 1080p or 720p without visible quality loss for text scans.
No app install means no App Store review, no update push, no subscription, and no permissions beyond a one-time camera allow — the browser handles it. Also means the scanner immediately gets bug fixes: nothing to update on your end.
PDF scanner on desktop and laptop
On a computer with a webcam, the scanner works the same way — hold the document under the webcam. Better on desktop: drag-and-drop a photo you already took with a real camera (JPG, PNG, HEIC, WebP, BMP, TIFF) onto the scanner and it processes them into a multi-page PDF. Great for batch-scanning a stack of receipts or contract pages you photographed with a phone but want to organise on a bigger screen.
Which filter should I pick?
- Contracts, letters, forms with colour logos: Auto-enhance keeps stamps, letterheads and coloured elements while cleaning the background.
- Handwritten notes, textbook pages, receipts: Black & White gives the cleanest look and the smallest file size — the same output style CamScanner defaults to.
- ID cards, photos, coloured artwork: Original or Auto-enhance to preserve the colours.
- Whiteboards, blackboards, uneven lighting: Grayscale handles mixed lighting better than colour filters.
Multi-page scanning without limits
Every capture becomes a new page in the same PDF. No page limit beyond what your device memory allows — most modern phones comfortably handle 50-page scans, desktops handle hundreds. You can reorder or delete individual pages from the strip below the scanner before downloading. When you're done, hit Download PDF and the whole document saves at once.
Free PDF scanner — really free
No signup, no email required, no watermark on any page, no "download 3 PDFs then upgrade" limit. This page is supported by unobtrusive display ads. The scanner itself is unconditionally free forever because everything runs in your browser — we have no server-side scanning cost to recoup.
Privacy — nothing uploaded
Every step — camera capture, edge detection, perspective warp, document filter, PDF assembly — happens in JavaScript inside your browser. Your document image never reaches our servers or any third party. You can verify by opening DevTools → Network tab while scanning; you will see zero image or PDF uploads.
This matters when the document is confidential: contracts, medical records, bank statements, ID cards, tax returns. Any "pdf scanner online" that uploads your document to their server has, at minimum, a copy of it. A browser-only scanner removes that trust question entirely.