Compress PDF
Reduce PDF file size by up to 90% — free & instant
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Compress PDF files online for free
OPUS PDF Compressor reduces your PDF file size by up to 90% without requiring any software installation. Whether you need to send a PDF by email, upload it to a portal with a file size limit, or simply save storage space, our free online compressor gets the job done in seconds.
How does PDF compression work?
Our compressor uses Ghostscript — the industry-standard PDF processing engine — to intelligently downsample images, remove redundant data, and optimise fonts inside your document. You choose the compression level: Screen for maximum size reduction, eBook for a balance of quality and size, Printer for print-ready output, or Prepress for professional publishing.
Your files stay private
We process your PDF on our secure server and delete it immediately after you download the result. We never store, share, or analyse your files. Your documents stay yours.