Is Compress PDF free to use?

Yes. Every core tool, including Compress PDF, is free to use with generous limits. Upgrade only when you need higher volume, larger files, or team features.

Are my files private?

Your documents are processed entirely in your browser. Files never leave your device and are never uploaded to a server, so your data stays private by default.

Which browsers are supported?

Any modern browser — Chrome, Edge, Safari, Firefox, and Arc — on desktop, tablet, or mobile.

How much smaller will my PDF get?

It depends on the contents — image-heavy PDFs shrink the most, while text-only files are already compact. Choose a stronger level for a smaller result, and you'll see the exact savings after compressing.

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Compress PDF

Reduce PDF file size while keeping quality high — perfect for email and uploads.

100% free
Private — in your browser
No sign-up

Compress PDF reduces PDF file size so documents attach to email and upload without hitting limits. Pick a compression level to shrink embedded images and strip waste while keeping pages readable — and because the PDF compressor runs entirely in your browser, your file stays private and is never sent to a server. Working with a big batch? Merge PDF first, then compress, or turn pages into pictures with PDF to JPG.

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How to compress pdf

1
Upload the PDF you want to compress.
2
Pick a compression level — recommended, strong, or maximum.
3
Let the tool optimize images and structure.
4
Download your smaller PDF and see how much you saved.

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Guides & tutorials

Step-by-step help that uses Compress PDF.

All guides