NVIN Scanner — PDF Scanner Documentation
Welcome to the official technical manual for NVIN Scanner, an on-device Android utility engineered by NVIN Softwares to convert paper documents, agreements, and receipts into crisp, standardized PDF files.
Getting Started & Scanning
Step-by-step workflow: granting camera permissions, positioning paperwork, corner cropping, and multi-page capture.
Image to PDF & Filters
Import existing photos from device gallery, reorder pages, and apply Black & White high-contrast, Grayscale, or Color filters.
Local PDF Merging Guide
Consolidate multiple separate PDF files into a single master document on device without uploading sensitive files to web converters.
Offline Architecture & Storage
Complete transparency on device permissions, internal directory structure, zero cloud uploads, and zero third-party telemetry.
Frequently Asked Questions
Answers to 10 common questions on storage locations, supported formats, watermarking policies, and download availability.
Troubleshooting Guide
Fixes for blank camera viewfinders, blurry photos, large file size reduction, and corrupted PDF merge resolution.
A Document Scanner Built for Integrity
Most mobile scanning apps on the market today inject forced watermarks on exported files, impose expensive monthly subscriptions, or secretly upload scanned paperwork to remote servers for ad profiling.
NVIN Scanner was engineered with the opposite ethos: your paperwork (identity cards, bank statements, legal agreements, receipts) belongs exclusively to you. Every crop calculation, threshold filter, and PDF generation routine runs directly in local phone memory.
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