How to Scan Multiple Pages into One PDF on Mobile (iOS & Android)
Scanning a multi-page document with your smartphone used to be a headache — you'd end up with separate image files or individual PDFs, then need a computer to combine them. In 2026, that workflow is completely unnecessary. Both iPhone and Android offer built-in document scanning with multi-page support, letting you scan an entire contract, report, or passport application as a single PDF file without touching a desktop. But there's still a common frustration: the resulting PDF is often enormous. Scanning 8 pages at full resolution can create a 30–50 MB file that crashes email uploads and takes forever to share. The solution is a two-step workflow — scan multiple pages into one PDF, then compress that PDF before sharing. This guide covers how to scan multiple pages to a single PDF on both iPhone and Android, explains the built-in scanner limitations you need to know, and shows you how to compress the resulting PDF to a shareable size using LazyPDF — all without leaving your phone.
Scan Multiple Pages to One PDF on iPhone
iPhone's built-in document scanner (available in the Notes app and Files app) supports multi-page scanning natively. Here's how to use it.
- 1Open the Notes app and create a new note, then tap the camera icon and select 'Scan Documents'
- 2Point your camera at the first page — iOS auto-detects the document edges and captures it automatically when the lighting is good
- 3After the first page is captured, the scanner stays open and shows a count of pages scanned (e.g. '1 Scan')
- 4Scan each additional page in sequence — just hold the camera over each page and it captures automatically
- 5When all pages are scanned, tap 'Save' — the note now contains a multi-page scanned PDF
- 6Tap the PDF thumbnail, then the share icon, and choose 'Save to Files' — this saves the complete multi-page PDF to your Files app
- 7Navigate to lazy-pdf.com/en/compress in Safari to reduce the file size before sharing
Scan Multiple Pages to One PDF on Android
Android has several options for multi-page document scanning. The most universal is Google Drive, which works on all Android phones. Manufacturer apps (Samsung, Xiaomi, etc.) also provide scanning, but the interface varies. **Using Google Drive (all Android devices):** Open the Google Drive app, tap the '+' button (New), and select 'Scan'. Point your camera at the first page. After capturing, you'll see options to 'Add' another page. Keep adding pages until your document is complete, then tap 'Save'. Google Drive saves the result as a multi-page PDF in your Drive. **Using Microsoft Lens (recommended for quality):** Microsoft Lens is a free app that provides excellent multi-page scanning. Open the app, scan the first page, then tap the '+' button to add more pages. When done, tap 'Done' and select 'PDF' as the output format. Lens lets you reorder pages before saving, which is very useful for complex documents. **Using the Files app or Gallery:** If you already have separate scanned images, you can combine them into one PDF without re-scanning. Upload all images to LazyPDF's 'Image to PDF' tool — it combines multiple images into a single PDF automatically.
Combine Existing PDF Pages on Mobile
Sometimes you've already scanned pages individually and need to combine them into one PDF after the fact. This is where LazyPDF's merge tool becomes useful on mobile. The merge workflow on mobile is straightforward: open LazyPDF in your mobile browser, navigate to the Merge PDF tool, and select multiple PDF files. The tool combines them into a single PDF in the order you choose, with no quality loss. You can also use this approach when different parts of a document come from different sources — some pages from a scanner, some from a Word document export, some from a camera photo. Convert images to PDF first using the Image to PDF tool, then merge everything into one unified document. For long documents (10+ pages), always compress after merging. The combined file will be the sum of all individual page sizes, which can be substantial. A quick compression pass through LazyPDF typically reduces the merged PDF by 50–70% without any visible quality difference.
Compress Your Multi-Page Scanned PDF Before Sharing
Regardless of how you created your multi-page PDF, compressing it before sharing is almost always worth doing. Here's a simple guide to compressing on mobile. For a 10-page scanned document at 300 DPI, expect a raw file size of 15–30 MB. After compression with LazyPDF, the same document typically comes in at 2–5 MB — well within the 10 MB limit for most email services and the 5 MB limit for many government portals. The compression process on mobile takes 10–30 seconds depending on file size and your internet connection. The tool works entirely in your browser with no app installation. After compression, download the file to your device and share via email, WhatsApp, AirDrop, or whatever method you need. For documents where both small size and text searchability are important (invoices, contracts, application forms), run OCR after compression. The OCR tool in LazyPDF adds a searchable text layer to your compressed scan, making the final document both lightweight and fully functional.
Frequently Asked Questions
Can I scan multiple pages into one PDF without any app on iPhone?
Yes. The Notes app on iPhone has a built-in document scanner that creates multi-page PDFs directly. Open Notes, create a new note, tap the camera icon, choose 'Scan Documents', and scan each page one by one. Tap Save when done. The resulting multi-page PDF is saved in the note and can be exported to the Files app or shared directly.
How large will a 10-page mobile scan be and can I reduce it?
A typical 10-page document scanned with a smartphone camera at high quality will produce a PDF between 15–30 MB. Using LazyPDF's compression tool, you can reduce this to 2–5 MB while keeping the text readable. This brings the file within the attachment limits of Gmail (25 MB), Outlook (20 MB), and most document portals (5–10 MB).
What if my pages scan in the wrong order on Android?
In Microsoft Lens, you can reorder pages after scanning by pressing and holding a page thumbnail and dragging it to the correct position before exporting. In Google Drive, you cannot reorder within the scanner — you'd need to export each page separately and merge them in the correct order using a PDF merge tool like LazyPDF.
Is there a limit to how many pages I can scan into one PDF on mobile?
The iPhone Notes scanner technically supports unlimited pages in one session, but practical limits exist — your phone may slow down after 50+ pages. Google Drive's scanner is best for documents under 20 pages; for longer documents, Microsoft Lens or a dedicated scanner app performs better. After scanning, LazyPDF accepts PDFs up to 100 MB for merging and compression.