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Build a File Scanner and PDF Creator App

Develop a mobile app that lets users scan documents using the phone camera, enhance image quality, and convert them into shareable PDFs—a practical and productivity-driven app development project.

Why Build a Scanner and PDF Creator App?

From students to professionals, people need an easy way to digitize and share documents. This app development project allows you to explore camera integration, image enhancement, edge detection, and PDF generation—perfect for solving real user needs.

Core Features of the App

The app captures images of documents, applies edge detection and enhancements like contrast and grayscale, and merges multiple scans into a single PDF. It also includes file renaming, saving, and sharing via email or cloud services.

Key Features to Implement

Camera-Based Document Scanning

Use the device camera to detect edges and capture document images with auto-cropping and focus.

Image Enhancement Filters

Apply brightness, contrast, grayscale, and sharpness adjustments to improve scan quality.

PDF Creation and Merging

Convert single or multiple scanned images into a PDF file and offer options for page arrangement and renaming.

File Saving and Sharing

Enable saving PDFs locally and sharing via email, WhatsApp, Drive, or cloud storage.

How the App Works

Users launch the camera scanner and align the document. The app detects edges, enhances the image, and lets the user save it. Multiple scans can be merged into a PDF and exported or shared from within the app.

  • Open the app and scan a document using the camera.
  • The app auto-detects edges and lets the user crop or adjust manually.
  • Image filters are applied to enhance readability.
  • Users can scan multiple pages and merge them into one PDF.
  • The final file is saved locally and can be shared via apps or uploaded to the cloud.
Recommended Tech Stack

Frontend

Flutter or React Native with image preview components, cropping tools, and PDF export UI.

Camera and Image Tools

ML Kit or OpenCV for edge detection and image enhancement; react-native-image-crop-picker or similar.

PDF Generation

react-native-pdf-lib or Flutter pdf package to merge images into downloadable PDFs.

Storage & Sharing

Local file system storage APIs, FileSaver, and platform share APIs for exporting files.

Step-by-Step Build Plan

1. Set Up Camera and Edge Detection

Access the device camera, detect edges in real time, and allow manual cropping.

2. Implement Image Filters

Add brightness, contrast, grayscale, and sharpen filters to improve readability.

3. Build PDF Generator

Merge scanned images into a multi-page PDF with optional page titles and reordering.

4. Add File Save and Export

Save files to local storage and enable sharing with apps like Gmail, WhatsApp, or Drive.

5. (Optional) Add OCR for Text Extraction

Use ML Kit or Tesseract OCR to convert scanned images to selectable/searchable text.

Helpful Resources for PDF Scanner App Development

Scan, Convert, and Share in Seconds

Create a smart, efficient file scanning and PDF generation app to digitize documents with ease—an essential and practical app development project for productivity users.

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