Reduce PDF file size while maintaining quality. 100% browser-based — files never leave your device.
A PDF compressor is a free online tool that reduces the file size of PDF documents without losing essential quality. It is ideal for emailing large PDFs, uploading to websites and reducing cloud storage usage.
Compress PDFs to under the email attachment limit (typically 10–25MB depending on provider).
Reduce PDF file size before uploading to websites, portals and cloud services with file size limits.
Compress archived PDFs to reduce cloud storage costs and backup sizes.
Make PDFs faster to download and view on mobile data connections.
Typically 20–70% depending on PDF content. Image-heavy PDFs compress most — up to 80%. Text-only PDFs compress less as text is already efficient.
No — text, fonts and vectors are losslessly compressed and remain perfectly sharp. Image compression may slightly reduce photo quality at high settings.
Medium compression typically reduces size by 40–60% with no visible quality difference for most use cases. Use high compression only for archival where file size matters more than image quality.
Each additional compression yields diminishing returns. A PDF compressed once to 50% of its original size will not compress significantly further.