Compress PDF
Downsample oversized images without flattening your text layer.
Runs in your browser
Instant processing
Batch: multiple files
No sign-up
How to use Compress PDF
1
Add one or more PDFs.
2
Pick a level, “Balanced” is right for most files.
3
Compare the before/after sizes and download.
Scanned PDFs typically shrink 60-90% because their pages are just large images. Text-only PDFs are already compact: when a file would not get smaller, you get the original back untouched with a note saying so.
Privacy
Nothing leaves this device
This page loads a local PDF engine and performs the whole job inside your browser tab. There is no upload step, no temporary server copy and no log of your document. Close the tab and every trace is gone.
No uploads
No tracking
Works offline
FAQ
Compress PDF questions
Is compress pdf free?
Yes: Compress PDF is completely free, with no account, no watermark and no file limit.
Are my files uploaded?
No. Compress PDF runs entirely in your browser using the local PDF engines. Your document is never transmitted to a server, which is why it also keeps working offline.
Does it work on phone and desktop?
Yes. Any modern browser on Windows, macOS, Linux, Android or iOS can run the tool, the interface adapts to the screen size.
Next steps
All tools