Compress PDF files
Shrink your PDF file size by up to 70% while keeping visual quality intact. Swift, efficient — a ninja never carries excess weight.
or drop PDFs here
How to compress pdf online free
Step 1
"Ebook" quality is recommended — great balance of size and clarity
Step 2
"Screen" gives the smallest file, best for emails
Step 3
"Prepress" keeps highest quality for printing
Frequently Asked Questions
Is this compress pdf tool free?
Yes, ThePDFNinja's compress pdf tool is 100% free to use. There are no hidden fees, subscriptions, or credit cards required.
How do I compress pdf for free?
Simply upload your document using the box above, configure any necessary options, and our servers will instantly process your file for free.
Do you store my files?
No. All files uploaded to ThePDFNinja are strictly confidential and are automatically and permanently deleted from our servers after 1 hour.
Does this work on Mac, iPhone, and Android?
Yes, as a web-based tool, it works flawlessly across all operating systems and devices, including Mac, Windows, iOS (iPhone/iPad), Android, and Linux.
Will there be a watermark on my file?
Absolutely not. We never add watermarks to your documents.
Why use ThePDFNinja to compress pdf?
ThePDFNinja provides the fastest, most reliable way to compress pdf online. Unlike other tools that force you to create accounts, pay subscription fees, or deal with heavy watermarks, our Compress PDF tool is completely free and accessible directly from your browser.
We prioritize your privacy above all else. Every document uploaded for compress pdf is processed in an isolated environment using AES-256 SSL encryption. Once your task is complete, the original and processed files are permanently deleted from our servers within 24 hours. We guarantee that your data is never read, analyzed, or shared with third parties.
Whether you are working from a desktop PC, a Mac, or a mobile device, you can easily compress pdf anywhere, anytime, without installing any software.