Best free PDF scanner apps for Android in 2026

The picks, ranked

1. 1

   

   PDF Scanner by iStack

   Fully free Android scanner with offline OCR and no account required.

   Pros

   • +100% free — no trial, no paywall, no subscription
   • +No account or sign-in required
   • +Works fully offline — documents never leave your device
   • +OCR text recognition built in
   • +Lightweight install, fast on older phones

   Cons

   • −No cloud sync (by design — privacy-first)
   • −Ad-supported interface
   About PDF Scanner by iStack →
2. 2

   Adobe Scan

   Polished scanner from Adobe with deep Document Cloud integration.

   Pros

   • +High-quality edge detection and image processing
   • +Integrates with Adobe Acrobat and Creative Cloud
   • +Free tier available

   Cons

   • −Requires free Adobe ID to use
   • −Uploads documents to Adobe's cloud
   • −Advanced OCR and export features require paid subscription
   Visit Adobe Scan ↗
3. 3

   Microsoft Lens

   Free Microsoft scanner tightly integrated with OneDrive and Office.

   Pros

   • +Free with a Microsoft account
   • +Good for Word, PowerPoint, and OneDrive workflows
   • +Solid whiteboard and business-card modes

   Cons

   • −Requires Microsoft account
   • −Best features assume OneDrive / Microsoft 365 use
   • −Save-to-device path is less streamlined
   Visit Microsoft Lens ↗
4. 4

   Google Drive Scan

   Built-in scanner inside Google Drive — no separate install.

   Pros

   • +Already on most Android phones — zero install friction
   • +Saves directly to Google Drive
   • +Free with a Google account

   Cons

   • −Requires Google account
   • −Documents upload to Google Drive (not offline-first)
   • −No OCR without additional Google Docs steps
   Visit Google Drive Scan ↗
5. 5

   CamScanner

   Feature-rich scanner with aggressive paid upsells.

   Pros

   • +Wide feature set — signatures, watermarks, cloud sync
   • +Good OCR accuracy in 60+ languages

   Cons

   • −Most features locked behind a subscription
   • −Documents uploaded to CamScanner's cloud
   • −Past security incidents reported in 2019 (malware SDK, since removed)
   Visit CamScanner ↗

How we picked

We tested each app on a Pixel 9 and a Samsung Galaxy A54 in April 2026. Criteria weighted: price transparency (20%), account requirement (20%), offline capability (20%), OCR quality on a 10-document corpus (20%), privacy — where documents are stored (20%). Ratings reflect features available to a user who does not pay and does not create an account.

Frequently asked questions

Which free PDF scanner for Android does not require an account?

▾

iStack PDF Scanner is the only scanner in this comparison that requires no account of any kind — no Adobe ID, Microsoft account, or Google sign-in. You install it and start scanning immediately.

Is Adobe Scan really free?

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Adobe Scan has a free tier but requires a free Adobe ID to use, and advanced features like combining PDFs, exporting to Word, and higher-quality OCR are locked behind an Adobe Acrobat subscription.

Which scanner works fully offline?

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iStack PDF Scanner processes everything on-device. Adobe Scan requires connectivity for OCR processing. CamScanner uploads documents to its cloud by default.

What is OCR and do I need it?

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OCR (Optical Character Recognition) converts the text in a scanned image into searchable, copyable text. You need it if you want to search inside scanned documents or copy text out of them. Most modern scanners include OCR.