Scanning a document to PDF on Android is built into several apps that most users already have installed. Google Drive is the most accessible option, but a few alternatives give you more control over quality and file organization.
How to Scan to PDF Using Google Drive on Android
Open the Google Drive app and tap the + button in the bottom-right corner. Select Scan from the menu. Point the camera at your document โ Drive detects the edges automatically and captures the scan. Review the result, adjust the crop if needed, then tap the checkmark. Drive saves it as a PDF directly to your chosen folder.
For multi-page documents, tap the + button on the preview screen after each page to add the next one before saving. All pages are combined into a single PDF in one operation.
Scanning to PDF With Microsoft Lens
Microsoft Lens is a free Android app that produces cleaner scans than the basic Google Drive scanner, particularly for documents with uneven lighting or curved pages from a bound book. Open Lens, select Document mode, and capture your page. Lens automatically straightens and enhances the image. Tap Done, select PDF as the export format, and save to your device or OneDrive.
Lens also exports to Word, PowerPoint, and OneNote โ useful when you want to scan a handwritten note directly into an editable format rather than a PDF.
Using the Samsung Camera to Scan Documents
On Samsung Galaxy phones, the built-in Camera app includes a Documents scanning mode accessed through Bixby Vision or the extra modes panel. It detects document edges, applies perspective correction, and lets you save the scan directly as a PDF. The result goes to the Gallery or a specified folder, from where you can share it or upload it to cloud storage.
Improving Scan Quality on Android
A few practices make a consistent difference. Place documents on a dark, non-reflective surface โ this makes edge detection more accurate. Make sure the page is flat and fully in frame before capturing. Use natural light or diffuse overhead lighting rather than a single point light source that creates shadows across the page.
After scanning, use the grayscale or black-and-white filter if the document is text-only โ this significantly reduces file size compared to a color scan while keeping text sharp and readable. Color is worth keeping for documents with charts, logos, or colored annotations.
Making Android Scans Searchable
Scanned PDFs from Android apps are image-based, which means the text is visible but not selectable or searchable. If you need to search, copy from, or index the content, run the scanned PDF through WukongPDF's OCR PDF tool after saving. Upload the scan in Safari or Chrome on your Android device, process it, and download the searchable version โ the whole step takes under a minute and makes the document far more useful for long-term reference.
For large batches of scanned documents โ receipts, invoices, contracts โ applying OCR to each one and storing the searchable versions in Google Drive creates a searchable archive you can query by keyword rather than opening files individually.