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Compress PDF

Reduce the file size of your PDF.

Free to useNo software to install — works in any modern browser.
No signup neededOpen the tool and start straight away.
Files deleted automaticallyUsed only to make your result. The result is deleted when you download it, or automatically after about an hour.
Works on mobileSame tool on your phone, tablet or desktop.

Prefer to just describe the task? The AI Assistant can convert, compress and resize files from a short instruction.

About Compress PDF

PDF compression reduces a file's size by re-encoding images and optimizing the internal file structure, without changing what the document looks like on the page. This matters most for PDFs with lots of images or scanned pages — those often carry far more data than they need to for screen or print use.

There's a real quality-versus-size tradeoff: lighter compression keeps quality closer to the original with a smaller size reduction, while higher compression saves more space at the cost of some image sharpness. For most everyday needs — emailing a document, uploading to a portal, sharing over WhatsApp — even moderate compression makes a noticeable difference in file size without a visible quality change.

Compress PDF guides

Frequently Asked Questions

Will compressing reduce my PDF's quality?

There's a small quality/size tradeoff depending on the compression level you choose.

How much smaller will my file get?

It depends on the content — PDFs with lots of images typically compress more than text-only documents.

Is there a file size limit?

The tool handles typical document sizes without issue; very large files may take longer to process.

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