Compress PDF
Compress PDF online free — reduce PDF file size without losing quality. No signup, no watermark. Fast, secure, and works on any device.
Why Compress Your PDF?
Reduce your PDF file size without losing quality. Perfect for:
- Sharing files via email - smaller attachments load faster
- Saving storage space - keep more documents on your device
- Faster uploads - send documents quicker to the cloud
- Better performance - reduce bandwidth usage
- Professional distribution - smaller files look more polished
How to Use
- Upload Your PDF: Click 'Select PDF File' or drag and drop your PDF onto the upload area.
- Click Compress PDF: Hit the Compress PDF button. Our tool automatically optimizes images, removes metadata, and reduces file size.
- Download Your Compressed PDF: Click Download to save your compressed PDF. Files are deleted from our servers after 1 hour.
Quick Tips
- Works with any PDF file - scanned documents, reports, presentations
- 100% secure - files are processed locally and never stored
- Fast processing - usually takes just a few seconds
- No quality loss - compression is visually imperceptible
Frequently Asked Questions
Is nanPDF's PDF compressor completely free?+
Yes. nanPDF is 100% free to use with no hidden charges, no watermarks, and no daily limits. No account required.
How much can I compress a PDF file?+
PDF files can typically be reduced by 40–70%. Image-heavy PDFs compress more than text-only documents.
Will compressing a PDF reduce its quality?+
Our compression minimizes quality loss while still significantly reducing file size.
Is it safe to upload my PDF?+
Yes. All uploaded files are processed securely and automatically deleted from our servers after 1 hour.
Can I compress a PDF on my phone?+
Absolutely. nanPDF works in any modern browser on iOS, Android, Windows, and Mac.