Compress PDF Online Free
Reduce PDF file size without losing quality — see exact savings, no signup
Drag & drop your file here
or click to browse
Files are automatically deleted after 1 hour · Max 20MB on Free plan
How to Compress a PDF Without Losing Quality
FilePro uses Ghostscript — the same engine used by Adobe Acrobat and enterprise PDF tools — to compress your PDF files. Ghostscript optimizes embedded fonts, downsamples images, and removes redundant metadata while preserving the content and structure of your document. According to the ISO PDF standard, compliant PDF files can be reduced by 30–70% without any visible quality loss. Typical reduction: 30–60% with Medium compression, up to 70%+ with High.
Features of our PDF compressor
Frequently Asked Questions
How much can I compress a PDF?
Typical PDF compression with Medium level reduces file size by 30–60%. High compression can achieve 70%+ reduction, especially for PDFs with embedded images.
Does compression reduce PDF quality?
Low compression preserves near-lossless quality. Medium is imperceptible for most documents. High compression may reduce image resolution in PDFs with large images.
What is the maximum PDF size?
Free users can compress PDFs up to 20MB. Premium users can compress PDFs up to 500MB.