ZapDox100% Free & Private

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Frequently Asked Questions

Everything you need to know about our privacy architecture, calculation accuracy, and tools.

Our engine parses the full text stream of both PDF documents page-by-page and runs a line-by-line diff algorithm to highlight changes.
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Explore Other 100% Free Tools

All tools run locally in your browser with zero server uploads and instant performance.

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Merge PDF Files

Combine multiple PDF documents into a single organized master file with drag-and-drop ordering and lossless quality.

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Extract & Cut

Split PDF Pages

Extract specific page ranges or split all PDF pages into separate individual documents with instant ZIP download.

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Visual Grid

Remove PDF Pages

Select and delete unwanted pages from PDF documents with interactive visual thumbnail grid.

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Custom Range

Extract PDF Pages

Pick specific page numbers or ranges (e.g. 1, 3-5, 8) and save them into a new standalone PDF.

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Drag & Drop

Organize & Reorder PDF

Reorder, duplicate, rotate, and sort PDF pages with drag-and-drop visual layout.

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Webcam Scanner

Scan to PDF (Camera & Photos)

Scan paper documents, receipts, and IDs using camera or batch photos and compile into PDF.

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