Modufile's Scan to PDF tool lets you capture images from your device camera or upload photos from your gallery and combine them into a clean, multi-page PDF document. Built-in enhancement options include automatic contrast adjustment, grayscale conversion, and brightness correction — all processed locally using the HTML5 Canvas API. The final PDF is assembled using pdf-lib, embedding each processed image as a full page. No server is involved at any step. This is useful for quickly digitizing receipts, notes, whiteboards, or paper documents using just your phone browser.