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Compress PDF Online Free

Drastically reduce the file size of your PDFs while maintaining the best possible quality. Ideal for email sharing.

🔒 100% Private

⚡ Instant

💯 No Watermark

📱 Mobile Friendly

📋 Quick Guide

How To Use

3 simple steps

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Upload your PDF

Drag and drop or select the PDF file to compress.

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Adjust Compression

Choose your desired compression level.

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Download

Get your compressed PDF instantly.

✨ Features

Everything You Need

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Up to 90% Reduction

Smart compression that significantly reduces file size.

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Adjustable Quality

Choose between maximum compression or optimal quality.

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Multiple PDFs

Compress multiple files at once.

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Ideal for Email

Reduce size to send via email without issues.

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Total Privacy

Everything is processed locally in your browser.

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No Limits

Free, no registration, and no watermarks.

❓ FAQ

Frequently Asked Questions

It depends on the content. PDFs with many images can be reduced up to 90%. Text-heavy documents have less compression margin.

Our smart compression optimizes images minimizing visible loss. You can choose the compression level according to your needs.

Yes, DuneTools processes everything locally in your browser. Your files are never uploaded to any external server.

PDFs protected with an opening password cannot be compressed without entering the password first.

There is no strict limit, but very large files may take longer depending on your device's power.