Reduce PDF file size for free. Choose your compression level and get a smaller file in seconds – all processing happens privately in your browser.
Drag & drop a PDF here, or browse
Files up to 50 MB are supported
📊 Compression Result
This free PDF compressor reduces your file size directly in your browser — no uploads, no sign‑ups, and no quality loss. Choose from three compression levels: Maximum (smallest file), Balanced (a mix of size and quality), or High Quality (best visual fidelity). The optimized PDF is ready in seconds and your original stays untouched.
Pro tip: Client‑side compression typically reduces PDFs by 15–25%. Text‑heavy documents compress best. If your PDF is already well‑optimized, you may see only a small reduction — that's normal. For maximum size savings, choose the "Maximum" level and consider splitting very large files first.
Will compression reduce the quality of my PDF?
No. PDFcone uses object‑stream optimization, which reorganizes the internal file structure without touching text or images. Your pages stay sharp at any zoom level.
How much size reduction can I expect?
Text‑heavy PDFs typically reduce by 15–25%. Image‑heavy PDFs may reduce more, while already‑optimized PDFs might show little or no change. The Maximum level gives the strongest compression.
Can I compress a password‑protected PDF?
No. PDFcone cannot open encrypted PDFs. Remove the password first, then use the compressor.
What happens to my file after compression?
Nothing. Your PDF is processed entirely in your browser's memory and discarded when you close the tab. No copy ever leaves your device.
Does this tool work on mobile?
Yes! The compressor is fully responsive and works on all modern phones and tablets.