Here is a complete, ready-to-run HTML document that compares two PDF files side-by-side, extracts and highlights text differences, and provides a visual page comparison – all client-side with no uploads. ```html Compare PDF – Side-by-Side Text & Visual Diff | Free & Private

🔍 Compare PDF – Side-by-Side Text & Visual Diff

Upload two PDFs, compare text differences or view pages side-by-side. 100% local, no upload, private.

📄 PDF A (Original)

📂

Drag & drop PDF A here, or click to browse

Select PDF

📄 PDF B (Modified)

📂

Drag & drop PDF B here, or click to browse

Select PDF

🔒 100% private: No file upload – all comparison runs in your browser. Your PDFs never leave your device.

📘 Compare PDF: Complete Guide

Our free PDF comparison tool lets you compare two PDF files side-by-side. Choose between text diff mode (shows added/removed text) or visual page mode (view pages next to each other). Perfect for contract reviews, version tracking, and document verification. 100% client-side, private, no upload.

✨ How It Works

Upload two PDFs (A and B). The tool uses PDF.js to extract text from each page. In Text Diff mode, it compares the full text using a line‑by‑line diff algorithm (highlighting additions in green and deletions in red). In Visual mode, you can scroll through pages side‑by‑side with page navigation. Everything runs locally.

🚀 Key Features

✅ Text diff with color-coded changes (added/removed lines).
✅ Side-by-side page viewer with page controls.
✅ Supports multi-page PDFs (text diff shows combined text).
✅ Works with selectable PDFs (text extraction).
✅ 100% client-side, zero upload, private.
✅ No watermarks, no registration.

⚠️ Note: For scanned/image PDFs, text extraction will not work (no text to compare). Use visual mode for scanned documents.

❓ Frequently Asked Questions

Is my PDF data secure?

Absolutely. All processing happens inside your browser. No file is uploaded to any server.

What if my PDFs are scanned images?

Text extraction will return empty. Use the "Side-by-Side Pages" mode to visually compare the pages.

Can I compare more than two PDFs?

Currently supports two PDFs. For multiple comparisons, repeat the process.

Does it compare formatting or images?

Text diff compares extracted text only. Visual mode lets you see page thumbnails to spot visual differences.

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