How it works
Choose or drop one PDF, select a real lossless optimization mode, then download the smaller file when compression produces a meaningful reduction.
PDF tool
Compress PDF
Reduce compatible PDFs with browser-local, lossless qpdf optimization. ConvertZiva does not upload your selected PDF to a server.
Live converter
Compress PDF
Compress a PDF locally in your browser with qpdf-powered lossless optimization. Files are not uploaded to ConvertZiva servers.
Drag & drop your file here, or choose a file. Supports one PDF up to 20.00 MB and 60 pages.
Best for PDFs with compressible streams or unoptimized object structure. It does not downsample image pixels.
Privacy
Compression runs in your browser with qpdf compiled to WebAssembly. Your PDF is not uploaded to ConvertZiva servers.
Current limits
Use one PDF up to 20 MB and 60 pages. Already optimized, encrypted, or damaged PDFs may not become smaller.
When this tool is useful
Use this for compatible PDFs that may benefit from lossless structural optimization before sharing or storing.
Format notes
PDF compression results vary. The current tool uses qpdf optimization and does not downsample images.