📄 PDF Compare Free – PDF Difference Tool

PDF Compare Free is a modern desktop application designed to compare two PDF files and highlight differences quickly and clearly. It features a clean side-by-side interface, real-time progress tracking, and smart text diff detection.

This version is ad-supported to keep it free for everyone.

---

🚀 Features

• ⚡ Fast PDF text comparison
• 🔍 Highlights added and removed content
• 📄 Multi-page comparison
• 📊 Real-time progress tracking
• 🔄 Smart diff algorithm (normalized comparison)
• 🧵 Multi-threaded processing for speed
• 🔎 Zoom in/out support
• 💾 Save and load comparison sessions
• 🖥️ Clean side-by-side UI
• 📢 Rotating ad banner (non-intrusive)
• 🧠 Handles large PDFs efficiently (with limits in free version)

---

🧰 Use Cases

• Compare document revisions
• Detect changes in contracts or reports
• Review edited PDFs
• Verify document updates
• Track differences in generated reports
• Compare exported system documents
• QA and proofreading workflows

---

⚙️ How to Use

1. Select PDF files:

   • Click 📄 Original PDF to choose the first file
   • Click 📄 Changed PDF to choose the second file

2. Click 🔍 Compare to start comparison

3. View results:

   • Left panel shows removed text (🔴)
   • Right panel shows added text (🟢)
   • Unchanged text appears normally

4. Monitor progress:

   • Progress bar updates in real-time
   • Status messages show current state

5. Optional tools:

   • 💾 Save session
   • 📂 Load session
   • ➕ Zoom In
   • ➖ Zoom Out
   • 🆕 Clear session

---

📦 Download (EXE)

Go to the Releases section and download:

PDFCompareFree.exe

No installation required — just run the executable.

---

⚠️ Important Notes

• Free version is limited to 25 pages per comparison
• Windows SmartScreen may show a warning (normal for unsigned EXE)
• Click More Info → Run Anyway if prompted
• Antivirus may flag PyInstaller builds as false positives
• Encrypted or protected PDFs are not supported
• Some PDFs may not extract text perfectly depending on structure

---

💡 Tips for Best Results

• Use text-based PDFs (not scanned images)
• Keep file sizes reasonable for faster processing
• Compare similar versions for clearer results
• Use zoom controls for better readability
• Save sessions to resume work later
• Avoid encrypted PDFs

---

📢 Ads & Support

This free version includes small banner ads:

• Ads rotate automatically
• Click to open product/tool pages
• ❌ No tracking
• ❌ No background processing
• ❌ No data collection

🙏 Ads help support development and keep the tool free.

---

💎 Pro Version

A Pro version (no ads + unlimited pages) is available with a cleaner experience.

👉 Upgrade here:
https://matetools.gumroad.com

---

🛠️ Built With

• Python
• Tkinter
• ttkbootstrap
• PyPDF2
• Pillow (PIL)
• threading
• difflib
• json

---

👨‍💻 Developer

Mate Technologies
https://matetools.gumroad.com

---

📄 License

This project is distributed for personal and commercial use.
Please do not redistribute modified versions without permission.

---

⭐ Support

If you find this tool useful:

• ⭐ Star the repo
• 🔗 Share it
• 💎 Consider upgrading to Pro

---

📷 Preview

---

🔥 Version

PDF Compare Free (Ad-Supported)
Release v1.2.0