Compress PDF
Reduce your PDF file size while maintaining quality. 100% free, fast, and secure. All compression happens in your browser - your files never leave your device.
Upload PDF File
Drag and drop your file here, or click to browse
Maximum file size: 10MB
Reduce File Size
Compress PDFs by 50-80% with adjustable quality settings to fit your needs.
Maintain Quality
Choose from three compression levels to balance file size and quality.
No Upload Required
Your files never leave your computer and stay private and secure.
Frequently Asked Questions
How does PDF compression work?
This tool compresses PDFs by re-rendering each page at a lower DPI (dots per inch) and converting images to JPEG format with adjustable quality. This significantly reduces file size while maintaining readability.
What compression levels are available?
Three levels are available: Low compression (150 DPI, best quality), Medium compression (100 DPI, balanced), and High compression (72 DPI, smallest files). Choose based on your quality requirements.
Is my PDF secure?
Absolutely! All compression happens entirely in your browser using JavaScript. Your PDF files never get uploaded to any server, ensuring complete privacy and security.
What file size reduction can I expect?
Typical compression ratios range from 50-80% depending on the compression level and original PDF content. PDFs with many images compress more than text-heavy documents.
Will the quality be affected?
Some quality reduction is expected with compression. Low compression maintains near-original quality, while High compression prioritizes file size. The Medium setting offers a good balance for most uses.
What's the maximum file size?
You can compress PDF files up to 10MB in size. This is sufficient for most documents including presentations and reports.