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Add a PDF and inspect its page previews.
Compress PDF privately.
Reduce PDF size with honest quality presets, page previews, and a before-and-after result summary.
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Drop one pdf file hereWe'll build private previews on this device
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How to use Compress PDF
Choose a quality preset or use the compression-strength slider, then compare original size, estimated output, and actual savings.
Make your changes
Choose a preset or adjust the strength slider while watching the estimate.
Verify and download
Compress and compare the actual before-and-after sizes.
Files stay on deviceCompletely freeVerified output
Questions about Compress PDF
Useful answers before you start.
Privacy+
PrivatePDF performs the document work inside your browser. Your PDF bytes are not uploaded for processing.
Local processing+
Preview every change and process locally in your browser. Free, private, and no signup.