Free Online PDF Tool
Compress PDF File Size
Reduce a PDF's file size — useful for emailing large documents or staying under upload limits — while keeping it readable.
Open Compress PDF →No signup required · Free up to 20MB per file
How to Use Compress PDF
- Upload the PDF you want to shrink.
- Pick a compression level: Low, Recommended, or Extreme.
- Click Compress and download the smaller file.
Frequently Asked Questions
Will compressing reduce the readability of my PDF?
The "Recommended" level is tuned to cut file size significantly with minimal visible quality loss; "Extreme" trades more quality for maximum size reduction.
Is my file uploaded to a server?
No. This tool runs entirely in your browser — your file is never uploaded anywhere, so nothing ever leaves your device.