Zero Cloud Retention · 100% On-Device Privacy Architecture Zero Permanent Retention · On-Device Core Privacy

Your documents belong to you. Not our servers.

Tax returns, leases, medical records, and NDAs shouldn't sit on unknown web servers. Scan, sign, compress, and lock your sensitive documents locally on your phone. Tax returns, leases, medical records, and NDAs shouldn't sit exposed on web servers. Scan, sign, organize, and lock documents on your phone, with secure zero-retention processing for heavy conversions.

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How does PDF Converter & Scanner protect confidential documents compared to web PDF tools?

PDF Converter & Scanner executes sensitive tasks—such as camera scanning, handwritten signature stamping, page reorganization, and password protection—directly on your physical device using native operating system sandboxing. For tasks requiring server power (Office conversions, deep compression, and repair), files are encrypted via TLS, processed in isolated temporary workers, and automatically swept from disk within 24 hours with zero permanent storage.

Verified: PDF Converter & Scanner Privacy Architecture & Security Declaration

Four ironclad privacy standards.

Architectural principles built directly into how the application handles data.

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100% On-Device

On-Device Core Tools

Core scanning, signing, and editing run locally on your phone's hardware. No files are uploaded to the cloud for core tasks. Scanning, signing, page management, and password locking run locally on your phone's hardware.

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Zero Sign-In Barrier

No accounts, passwords, or email addresses required. Open the app and begin working immediately without exposing personal identity.

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256-Bit AES Encryption

Standard Password Lock

Lock files with industry-standard encryption recognized by Adobe Acrobat and Apple Preview. Restrict unauthorized viewing or printing. Lock files with standard PDF encryption recognized by Adobe Acrobat, Apple Preview, and web browsers.

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Zero Data Retention

Zero Permanent Retention

Files processed by remote conversion workers are purged immediately upon client download. Zero logs, zero caching, zero AI training. Files sent for backend conversion or compression are automatically purged from disk after processing. Zero logs, zero caching, zero AI training.

How to Password Protect a PDF on Mobile

Secure confidential files in under 20 seconds.

1Select Document

Choose any PDF file from your device storage or in-app document library.

2Set Secret Password

Enter a strong password with visibility verification to prevent accidental typos, and configure optional print/copy restrictions.

3Encrypt & Share Safely

Tap Encrypt & Save. The file is sealed with standard 256-bit AES encryption ready to email or store securely.

Privacy & Security Questions & Answers

Details about offline access, encryption standards, and data handling.

Is it safe to use online PDF converters for confidential legal or tax documents?expand_more

Many web-based PDF converters upload your files to remote third-party cloud servers where they may be stored, indexed, or accessed by automated scripts. PDF Converter & Scanner minimizes exposure: sensitive operations like scanning, signature placement, page organization, and password protection execute locally on your physical device, while heavy backend tasks (Office conversion, deep compression, repair) run through automated zero-retention processing.

What encryption standard does PDF Converter & Scanner use to protect documents?expand_more

The app applies standard PDF password protection compatible across all PDF readers, including Adobe Acrobat, Apple Preview, Google Drive, and web browsers. Protected PDFs require the user password to open or view.

Can I remove password protection from a PDF I own?expand_more

Yes. Use the Unlock PDF utility. Enter the valid password once, and the app will generate an unlocked copy saved directly to your local library so you can open it freely without re-typing the password.

Do you sell, share, or train AI models on my documents?expand_more

Never. Core operations execute locally on your device without leaving your hardware. When using backend features (such as Office conversion or compression), files are held temporarily in isolated workers strictly to fulfill the job, and automatically purged by our Janitor sweep. We never view, log, sell, or train AI models on your files.