Compress PDF
Re-encodes embedded images on your device and repacks streams — no upload.
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How to use Compress PDF free
- Drop a PDF.
- Click Compress.
- Download the result.
Why GroundPDF?
- No upload — documents stay on your computer.
- No account, no daily limits.
- Ground vs cloud — your file doesn’t earn frequent-flyer miles.
- Offline after first load.
Compress PDF FAQs
Will compress PDF reduce quality?
GroundPDF re-encodes embedded photos as JPEG at your chosen quality and repacks other streams. Text stays vector. Always preview important pages.
How small can I make a PDF?
Depends on the content. Scanned image-heavy PDFs shrink most (especially on Low). Text-only PDFs often shrink less.
Is compress PDF private?
Yes. Compression runs locally in your browser — the PDF is never uploaded.
Do you upload my files?
No. GroundPDF processes files entirely in your browser with WebAssembly. Files never leave your device — nothing is uploaded to a server.
Is it free?
Yes. Free to use with no account and no daily limits.
Which devices and browsers work?
Any modern browser with WebAssembly support: Chrome, Firefox, Safari, and Edge on desktop or mobile.
How is this different from iLovePDF or Smallpdf?
Those tools upload your files to the cloud. GroundPDF runs on your device (on the ground, not in the cloud), so your documents stay private by design.