PDF Scanner: Image to PDF, OCR

iStack

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About this app

Turn your phone into a powerful PDF scanner and image converter that works completely offline. No login required, no watermarks, no limits.

Scan Documents Instantly

Open the built-in document scanner, point your camera, and capture clean scans with automatic edge detection and perspective correction. Save every scan as a searchable PDF file in seconds. The scanner adapts to different lighting conditions and document sizes automatically.

Perfect for contracts, receipts, invoices, handwritten notes, whiteboards, ID cards, certificates, and business forms. Whether you need to digitize a single page or scan a full stack of documents, the scanning process stays fast and accurate.

Convert Any Image to PDF

Select photos from your gallery and convert them into professional PDF documents. Supports JPG to PDF, PNG to PDF, and BMP to PDF conversion with full quality control. Every image keeps its original resolution during conversion.

Combine multiple images into a single PDF file. Rearrange pages with drag-and-drop before exporting. Choose your preferred page size, orientation, margins, and compression level. Create compact files for email or high-quality documents for printing.

Use this image to PDF converter for homework, presentations, photo albums, portfolios, and any project that needs images organized in one document.

OCR Text Recognition

Extract text from scanned documents and photos using built-in OCR technology. Copy detected text, search within documents, and reuse content without retyping. The text recognition engine processes printed text, handwritten notes, business cards, and receipts with high accuracy.

Ideal for digitizing meeting notes, converting paper invoices to editable text, and making old documents searchable again. OCR works directly on your device without uploading files to any server.

Edit Images Before Conversion

Crop, rotate, adjust brightness, contrast, and apply filters to every image before creating your PDF. Fine-tune each page individually or apply changes across multiple images at once. Get the exact layout you need without a separate photo editor.

The image editor includes grayscale conversion, color adjustment tools, and a real-time preview so you see results before saving.

Sign and Secure Your Documents

Add your electronic signature directly inside the app using the drawing pad with color options. Sign contracts, forms, agreements, and official documents right from your phone. Protect sensitive PDF files with password encryption before sharing or storing them.

Your signature is saved for quick reuse across multiple documents, making the signing process efficient for repeated tasks.

Share and Export Anywhere

Send your PDF files through email, messaging apps, cloud storage, or any sharing method on your device. One-tap export makes distribution fast and simple. Share individual pages or complete multi-page documents with anyone.

Manage Your PDF Library

Rename, organize, sort by name, size, or date, and access all your documents from one clean interface. Find recent files quickly and keep your document collection organized. Preview any PDF before opening it fully.

All scanned documents and converted files are stored locally, giving you full control over your document library without depending on cloud services.

Why Choose This PDF Scanner?

No account or login needed to start scanning
Works completely offline without internet connection
No watermark added to any document you create
Unlimited scans, conversions, and exports
Lightweight app that runs fast on any device
Private and secure — all files stay on your phone
Supports multiple page sizes including A4, Letter, and Legal

Built for students scanning lecture notes, professionals digitizing contracts, freelancers managing invoices, and anyone who needs a reliable document scanner and photo to PDF converter in their pocket.

Start scanning and converting your documents today.

What’s new

First Release