How to Scan Documents with Your Phone — Step-by-Step Guide (2026)

Over 3.4 billion people worldwide own a smartphone, and every one of those devices can function as a document scanner. Modern phone cameras combined with intelligent edge detection software produce scans that rival dedicated flatbed scanners for most everyday tasks.

Whether you need to scan a contract, receipt, ID card, or multi-page report, this guide walks you through the entire process from preparation to final PDF output.

What You Need to Scan Documents with Your Phone

Document scanning with a phone requires only two things: a smartphone with a working camera and a scanning app. Here is what to know about each:

• Any modern smartphone works. iPhones from iPhone 6s onward and Android phones from the last 5 years all have cameras capable of producing clear document scans. A 12-megapixel camera or higher is ideal.
• Built-in scanning is available on most phones. iPhones have a scanner in the Notes app. Google Pixel phones include one in Google Drive. Samsung phones have it in the Camera app.
• Third-party apps add OCR and PDF features. Apps like PDFScan Pro, Adobe Scan, and Microsoft Lens offer automatic edge detection, text recognition (OCR), and direct PDF export.

Step-by-Step: How to Scan a Document with Your Phone

Step 1: Prepare the Document

Place the document on a flat surface with a contrasting background. A white document on a dark desk or a dark document on a light table gives the edge detection algorithm clear boundaries to work with. Smooth out any wrinkles or folds — creased paper creates shadows that reduce scan quality and OCR accuracy.

Step 2: Set Up Proper Lighting

Lighting is the single most important factor in scan quality. Follow these rules:

• Use diffused, even lighting. Overhead room lights or natural daylight from a window work best. Avoid direct sunlight, which creates harsh shadows.
• Eliminate shadows. Position yourself so your body and phone do not cast a shadow on the document. If scanning near a window, face the window so light falls evenly on the page.
• Avoid flash. Phone flash creates glare spots, especially on glossy paper. If you must use artificial light, position a desk lamp at a 45-degree angle to the document.

Step 3: Position Your Phone Correctly

Hold your phone directly above the document, parallel to the surface. Keep a distance of 8-12 inches (20-30 cm) for a standard letter-sized page. The entire document should be visible in the camera frame with some margin around the edges. Avoid tilting the phone — even a slight angle distorts the perspective and makes text harder to read.

Step 4: Capture the Scan

In your scanning app, tap the capture button. Most modern scanning apps offer automatic capture — they detect the document edges and take the photo when the camera is steady. Wait for the automatic detection to highlight the document borders before triggering the capture.

Step 5: Review and Adjust

After capturing, review the scan. Most apps let you:

• Adjust the crop: Drag the corner handles to fine-tune the document boundaries if the automatic detection missed an edge.
• Apply filters: Choose between color, grayscale, or black-and-white. For text documents, the black-and-white or grayscale filter produces the cleanest results and smallest file sizes.
• Rotate if needed: Fix the orientation so text reads left to right and top to bottom.

Step 6: Scan Additional Pages

For multi-page documents, tap “Add Page” or the “+” button to scan the next page. Most apps batch multiple pages into a single document. Continue until all pages are captured.

Step 7: Save as PDF

Export the scan as a PDF file. PDF is the standard format for scanned documents because it preserves layout, supports multi-page files, and is universally viewable. Most scanning apps default to PDF output. If you need to convert images to PDF, use PDFScan Pro's Image to PDF tool.

Scanning on iPhone: Built-in Methods

iPhones running iOS 11 or later have two built-in document scanners:

Method 1: Notes App

Open the Notes app, create a new note or open an existing one, tap the camera icon at the bottom, and select “Scan Documents.” The camera activates with automatic edge detection. Position the document and the phone captures it automatically when it detects stable borders. You can scan multiple pages, then save or share the result as a PDF.

Method 2: Files App

Open the Files app, navigate to the folder where you want to save the scan, tap the three-dot menu in the upper right, and select “Scan Documents.” This method saves the PDF directly to your chosen folder in iCloud Drive or on your device.

Scanning on Android: Built-in Methods

Most Android phones offer built-in scanning through Google Drive:

Open the Google Drive app, tap the “+” button, and select “Scan.” The camera opens with edge detection. Capture your document, crop if needed, and save as a PDF to your Google Drive. Samsung phones also offer a document scanning mode in the default Camera app.

Best Practices for High-Quality Scans

Follow these guidelines to consistently produce clear, professional document scans:

• Clean your camera lens. Fingerprints and smudges on the lens cause blurry scans. Wipe the lens with a soft cloth before scanning.
• Use the highest resolution setting. More megapixels means more detail. If your scanning app has a quality setting, set it to the highest option.
• Hold steady or use a surface. Camera shake causes blur. Rest your elbows on the desk or prop your phone on a stack of books for stability.
• Scan in portrait orientation for portrait documents. Match the phone orientation to the document orientation for the best fit.
• Use a contrasting background. Dark desk for white paper, white surface for dark documents. This helps edge detection identify boundaries accurately.

File Formats: PDF vs. JPG vs. PNG

Scanning apps typically offer multiple output formats. Here is when to use each:

• PDF: Best for documents. Supports multi-page files, preserves text layout, and is the standard for business and legal documents. Use PDF for contracts, reports, forms, and any multi-page scan.
• JPG: Best for single-page scans where small file size matters. JPG uses lossy compression, which reduces file size but slightly degrades quality. Good for receipts and informal records.
• PNG: Best for scans where quality is critical. PNG uses lossless compression, preserving every detail. File sizes are larger than JPG. Use PNG for archival purposes or when OCR accuracy is paramount.

Making Scanned Documents Searchable with OCR

A standard phone scan produces an image-based file — the text exists only as pixels, not as selectable or searchable characters. To make scanned text searchable, you need OCR (Optical Character Recognition).

OCR analyzes the image and converts the visible text into digital characters that you can search, copy, and edit. Most premium scanning apps include built-in OCR. You can also process existing scans using PDFScan Pro's OCR tool or convert scanned documents to editable text with the PDF to Text tool.

Frequently Asked Questions

Can I scan documents with my iPhone?

Yes. iPhones have a built-in document scanner in the Notes app (iOS 11 and later) and the Files app (iOS 13 and later). Open Notes, tap the camera icon, and select “Scan Documents.” The camera automatically detects document edges and captures a high-quality scan. Third-party apps like PDFScan Pro, Adobe Scan, and Microsoft Lens offer additional features such as OCR text recognition, automatic filters, and direct cloud upload.

What is the best app to scan documents?

The best document scanning app depends on your needs. For quick scans with PDF processing and OCR, PDFScan Pro handles scanning and PDF tools in one platform. Apple Notes is excellent for basic iPhone scanning with no extra download needed. Google Drive includes a built-in scanner for both Android and iOS. Microsoft Lens integrates seamlessly with Office 365 and OneDrive. Adobe Scan provides high-quality OCR but requires a paid subscription for advanced features like PDF export and combining scans.

How do I scan a document to PDF?

To scan a document to PDF: (1) Open a scanning app on your phone, such as Notes on iPhone or Google Drive on Android. (2) Place the document on a flat, contrasting surface with even lighting. (3) Hold your phone parallel to the document, about 8-12 inches above it. (4) Let the app detect the edges and capture the image. (5) Crop and adjust the scan. (6) Save or export as PDF. If you already have photos of documents, you can convert them to PDF using PDFScan Pro's Image to PDF tool, which combines multiple images into a single PDF file.