You do not need a traditional scanner or a paid scanning application to turn paper documents into clear PDF files. Both iPhone and Android devices include free tools that can capture receipts, letters, forms, invoices and multipage documents.
This guide explains the simplest built-in methods, how to improve scan quality and what to check before uploading sensitive documents.
Quick Answer
- iPhone: Use the Scan Documents option inside Apple Notes or the Files app.
- Android: Use the scanner inside Google Drive or Files by Google.
- Multipage documents: Scan each page before saving to create one combined PDF.
- Best results: Use a flat surface, good lighting and a contrasting background.
How to Scan a Document on iPhone Using Notes
Apple Notes includes a document scanner, so most iPhone users do not need to install another application.
- Open the Notes app.
- Create a new note or open an existing note.
- Tap the Attachment button.
- Select Scan Documents.
- Position the document inside the camera frame.
- Allow the iPhone to capture the page automatically, or press the shutter button manually.
- Adjust the corners if the crop is not accurate.
- Tap Keep Scan.
- Scan any remaining pages.
- Tap Done when finished.
The scanned pages will be stored inside the note. You can then share the document, save it elsewhere or use Markup to add a signature.
How to Sign a Scanned Document on iPhone
- Open the scanned document inside Notes.
- Tap the Markup button.
- Tap the add button and select Signature.
- Create a signature or choose one you previously saved.
- Resize and place it in the correct area.
- Tap Done.
How to Scan a Document Using the iPhone Files App
Use the Files app when you want to save the scan directly inside a specific folder rather than attaching it to a note.
- Open the Files app.
- Navigate to the folder where you want to save the document.
- Tap the three-dot menu.
- Select Scan Documents.
- Position the first page inside the camera frame.
- Capture and adjust the page.
- Add any additional pages.
- Tap Save.
This method is useful when organising scans inside iCloud Drive, On My iPhone or another compatible storage location.
How to Scan a Document on Android Using Google Drive
Google Drive includes a scanner that can turn paper documents into PDF files and save them directly in your Drive account.
- Open the Google Drive app.
- Tap the camera or scan button. On some versions, you may first need to tap the plus button.
- Point the camera at the document.
- Capture the page manually or use automatic capture when available.
- Adjust the crop and rotation.
- Choose an appropriate colour or black-and-white filter.
- Add more pages when required.
- Enter a clear filename.
- Choose the destination folder.
- Tap Save.
The document is saved as a PDF in Google Drive, allowing you to access it from other devices signed into the same account.
Alternative Android Method: Files by Google
Some Android devices include Files by Google, which also offers a dedicated Scan option.
- Open Files by Google.
- Tap Scan.
- Place the document inside the outlined area.
- Select automatic or manual capture.
- Review the crop and orientation.
- Add more pages if necessary.
- Save the finished document.
This can be a useful alternative when you prefer to manage the resulting file locally rather than beginning inside Google Drive.
Which Scanning Method Should You Use?
| Device | Recommended Tool | Best For |
|---|---|---|
| iPhone | Apple Notes | Quick scanning, signing and sharing |
| iPhone | Files | Saving directly into organised folders |
| Android | Google Drive | Cloud storage and access from multiple devices |
| Android | Files by Google | Simple file management and local organisation |
How to Get a Clearer Document Scan
Use Bright, Even Lighting
Avoid placing the document directly under a strong lamp that creates glare. Natural light or evenly distributed indoor lighting usually produces a clearer result.
Use a Contrasting Background
Place a white page on a darker table or surface. This makes it easier for the application to detect the document edges automatically.
Keep the Phone Parallel
Hold the camera directly above the document. Tilting the phone can distort text and make automatic cropping less accurate.
Clean the Camera Lens
A fingerprint or dust on the camera lens can make text look soft or blurred. Clean the lens before scanning important pages.
Check Every Page Before Saving
Zoom in and confirm that names, dates, account numbers and small print remain readable. Re-scan any blurred or incorrectly cropped page.
Should You Use a Free Third-Party Scanner App?
Third-party scanning applications may provide extra features, but many basic tasks can already be completed using Apple Notes, Files by Apple, Google Drive or Files by Google.
Before uploading passports, identification documents, bank statements, contracts or medical paperwork to an unfamiliar application, check:
- Who operates the application.
- Whether the document is uploaded to external servers.
- Whether scans are used for analytics or advertising.
- Whether the application requires an account.
- How documents can be deleted.
- Whether a free trial automatically becomes a paid subscription.
For sensitive documents, using a built-in tool from the device manufacturer or your existing cloud provider may reduce the number of additional companies receiving the file.
Can You Scan Multiple Pages Into One PDF?
Yes. Apple Notes, Apple Files and Google Drive allow additional pages to be captured before the final document is saved. Keep adding pages during the same scanning session rather than creating a separate file for each page.
Can You Scan a Document Without an Internet Connection?
The camera and scanning process may work without an active connection, but cloud-based storage and synchronisation may not complete until the device reconnects to the internet.
Before closing the application, confirm that the scan has been saved successfully, especially when working with an important original document.
Is a Phone Scan the Same as a Photograph?
A normal photograph usually includes the table, background and camera perspective. A document scanner attempts to detect page edges, correct the perspective, crop the background and combine multiple pages into a document-style file.
Bottom Line
The easiest free option depends on the device you already use:
- Use Apple Notes for fast scanning and signing on iPhone.
- Use Apple Files when you want direct folder organisation.
- Use Google Drive for convenient PDF scanning and cloud access on Android.
- Use Files by Google as another simple Android alternative.
Always inspect the finished PDF before deleting, mailing or returning the original paper document.