How to compress a PDF online
- Upload your PDF — drag and drop the file into the box above, or click to browse your device.
- Pick a compression level — Light keeps quality closest to the original; Extreme gives the smallest file.
- Compress and download — click “Compress PDF” and your smaller file is ready in seconds.
Why compress a PDF?
Smaller PDFs upload faster, attach cleanly to emails with strict size limits, and load quicker when shared online.
Is it safe to use this tool?
Yes. Files are transferred over an encrypted SSL connection and automatically deleted from our servers within one hour. We never read, share or store your documents.
Frequently asked questions
Will compressing reduce the quality of my PDF?
The Recommended setting is tuned to be visually lossless for most documents. Extreme compression may soften images slightly for maximum size reduction.
Does it work on mobile?
Yes. The tool works in any modern browser on iPhone, Android, tablets and desktops.
Is there a file size limit?
You can upload PDFs up to 100 MB.
Will there be a watermark?
No. Your compressed PDF is completely clean — no watermarks, no branding.