Drop a PDF here or click to browse100% client-side.
About this tool
How does PDF compression work in the browser?
The tool re-renders each PDF page at a reduced resolution using browser canvas APIs and repackages the result. Image-heavy PDFs see the largest reduction; text-only PDFs compress minimally.
Are my PDFs uploaded to a server?
No. Compression runs 100% client-side. Your documents never leave your machine.
How much will my PDF shrink?
Photo-heavy PDFs typically shrink 40–70%. Text-only or vector PDFs may shrink 10–30%. The tool shows before/after file size.
Does compression reduce quality?
Yes, slightly. The quality slider lets you balance file size against visual fidelity. At high quality settings the difference is invisible on screen.