How to Scan Documents to PDF (Phone or Scanner)
The short answer
To scan documents to PDF, use your phone: the Files app on iPhone or Google Drive on Android will scan a page with the camera and save it as a PDF in seconds. A physical scanner works too, but for most people the phone is genuinely the better tool.
Scan to PDF with an iPhone
- Open the Files app, tap the three-dot menu, and choose Scan Documents.
- Hold the phone over the page — it auto-captures when it detects the edges.
- Scan more pages if you have a stack, then tap Save. It lands as a PDF.
The auto edge-detection is shockingly good — it straightens the page and flattens shadows. This is faster and cleaner than most flatbed scanners.
Scan to PDF with an Android phone
Google Drive has the same trick built in: open the Drive app, tap the + button, choose Scan, and shoot your pages. They save straight to Drive as a PDF you can share or download. Same auto-detection, same quality, zero apps to install.
Scan to PDF on a real scanner
If you’ve got a multifunction printer, most of them scan to PDF natively — put the page in, pick “Scan to PDF” on the panel, and it saves to USB or email. Just remember to check the resolution setting: 300 DPI is the sweet spot for documents you’ll keep; anything higher just makes giant files.
The honest part
Here’s the thing nobody says: a phone scan of a paper page is a photo of text, not text. If you scan a contract and later want to edit, search, or copy the words, you can’t — not until you run OCR on it. Tools exist for that (and our PDF to Markdown converter can extract readable text from digital PDFs), but a raw scan stays a picture until something reads it.
Also watch the file size: scanning a 20-page document on your phone produces a chunky PDF. If email complains, compress it before sending.