Compress PDF Online Free – Fast, Secure & Client-Side

Reduce your PDF file size instantly with our powerful browser-based compression tool. No uploads, no registration, completely free.

🔒 100% Private
⚡ Lightning Fast
💯 Always Free
Compress PDF Now

The Best Way to Compress PDF Online Free

Looking to compress PDF online free? ShrinkMyPDF offers a revolutionary approach to PDF compression that prioritizes your privacy and security. Unlike traditional online PDF tools that upload your files to remote servers, our client-side technology processes everything directly in your browser.

With ShrinkMyPDF, you can reduce PDF file sizes by up to 90% without compromising quality. Whether you need to email large documents, save storage space, or speed up file transfers, our free PDF compressor handles it all—instantly and securely.

Upload Your PDF

Your file never leaves your device – 100% secure and private

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Drag & Drop PDF Here

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Maximum file size: 50MB

Why Choose ShrinkMyPDF?

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100% Free PDF Compression

No hidden fees, no subscriptions, no premium tiers. Compress unlimited PDFs without spending a penny. Our tool is completely free now and forever.

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Works Directly in Your Browser

Your PDFs are processed entirely on your device using advanced client-side technology. No file uploads to servers means zero privacy risks.

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Secure & Private

We never see, store, or access your files. Everything happens locally in your browser, ensuring complete confidentiality for sensitive documents.

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Fast Compression

Experience lightning-fast PDF compression powered by WebAssembly. No waiting in queues or server processing delays—get results instantly.

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Flexible Compression Options

Choose from Low, Medium, or High compression levels to balance quality and file size according to your specific needs.

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Works on Any Device

Whether you're on desktop, tablet, or mobile, ShrinkMyPDF works seamlessly across all modern browsers and devices.

How It Works

Compress your PDFs in just three simple steps

1

Upload Your PDF

Drag and drop your PDF file into the browser, or click to select it from your device. The file stays on your computer—no uploads to external servers.

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2

Choose Compression Level

Select Low (best quality), Medium (balanced), or High (maximum compression) based on your needs. Each level offers different file size reductions.

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3

Download Compressed PDF

Click compress and watch your PDF shrink in seconds. Download the optimized file and enjoy reduced file size with maintained quality.

Frequently Asked Questions

Is ShrinkMyPDF really free?

Yes! ShrinkMyPDF is completely free with no hidden costs, subscriptions, or premium features. You can compress unlimited PDFs without paying anything.

Are my files safe and private?

Absolutely. Your PDFs never leave your device. All compression happens locally in your browser using client-side JavaScript, ensuring complete privacy.

What's the maximum file size?

You can compress PDFs up to 50MB. For most documents, this is more than sufficient. Larger files may slow down processing depending on your device.

Will compression affect PDF quality?

Our Low compression maintains excellent quality. Medium offers a good balance. High compression reduces size significantly but may affect image quality slightly.

Which browsers are supported?

ShrinkMyPDF works on all modern browsers including Chrome, Firefox, Safari, Edge, and Opera. Make sure JavaScript is enabled.

Can I compress multiple PDFs at once?

Currently, you can compress one PDF at a time. Simply compress and download, then upload your next file. Batch processing is coming soon!