Free · no upload · no sign-up
Compress PDF files
Shrink your PDF to fit email and upload limits, right in your browser.
Drop your file hereor
PDF · processed on your device, never uploaded
How to compress pdf files
- Add the PDF you want to shrink.
- Pick a compression level — Balanced works well for most documents.
- Click Compress PDF and compare the new size before downloading.
Your documents stay private. PDF Expert runs entirely in your browser — files are processed on your own device and are never uploaded to a server.
Frequently asked questions
How does PDF compression work here?
PDF Expert re-renders each page and re-encodes its images at a lower quality, which is where most PDF weight lives. Text stays crisp at the Balanced and Light settings for typical documents.
Will compression reduce quality?
Strong compression trades some image sharpness for a much smaller file. Balanced is designed to be visually close to the original for everyday reading and printing.
Is my PDF uploaded to compress it?
No. Compression runs entirely on your device, so it's safe for confidential documents.