Free PDF Compressor
Compress PDF files to reduce size without losing quality. 100% free, private, browser-based.
How to Use
- 1Upload your PDF file by clicking the upload area or dragging and dropping.
- 2Choose a compression quality level.
- 3Click Compress and wait for processing to complete.
- 4Download your compressed PDF.
Drop a PDF here or click to upload
Your file stays in your browser
Frequently Asked Questions
How does PDF compression work in the browser?
This tool re-renders each PDF page onto a canvas at a reduced quality setting, then reassembles them into a new, smaller PDF. Images within the PDF are the main source of size reduction.
Is my PDF uploaded to a server?
No. All processing happens entirely in your browser. Your PDF never leaves your device.
Will compression reduce quality?
There may be a slight reduction in image quality depending on the compression level you choose. Text-heavy PDFs see minimal quality loss.
What is the maximum file size?
There is no server-side limit since processing is local. However, very large PDFs (over 100 MB) may be slow depending on your device.
About PDF Compression
PDF files can become large due to embedded images, fonts, and metadata. Compressing PDFs reduces file size for easier sharing via email, faster uploads, and less storage usage. This tool compresses PDFs by re-rendering pages at optimized quality levels, all within your browser for maximum privacy.