Compress PDF Online Free
Reduce PDF file size with adjustable compression levels
Select a PDF file to compress
Compression Level
Balanced — good quality with significant size reduction.
How to Use Compress PDF Online Free
- 1Upload a PDF file (up to 100 MB).
- 2Choose a compression level: Low (best quality), Medium (balanced), or High (smallest size).
- 3Click Compress PDF and wait for processing.
- 4Download the compressed PDF.
About Compress PDF Online Free
Compress PDF files online for free — reduce file size without losing readability. Choose low, medium, or high compression to balance quality and size. Works entirely in your browser, no upload to any server.
Frequently Asked Questions
How does compression work?
The tool re-renders each page as a compressed JPEG image at the selected quality level, then reassembles them into a new PDF. This significantly reduces file size, especially for PDFs with large images.
Will I lose text selectability?
Yes — the compressed PDF contains page images rather than selectable text. Use Low compression for best readability.
What compression level should I choose?
Low for documents you need to read closely, Medium for general sharing, High for email attachments where small size matters most.
Is my file uploaded to a server?
No. Everything runs in your browser. Your PDF never leaves your device.