Compress PDF File Online

Reduce PDF file size while optimizing for maximum visual quality. Quick, private, and 100% free.

Select PDF file

or drop PDF here

💡 How to Compress PDF File Size Online

Step 1: Upload PDF

Select or drag and drop your PDF file into the upload zone above.

Step 2: Choose Level

Select your preferred compression preset (Extreme, Recommended, or Less Compression).

Step 3: Download PDF

Click Compress PDF to reduce file size up to 70% and download instantly.

Why Compress PDFs with The PDF Lab?

📉 Up to 70% Real File Size Reduction

Advanced image stream downsampling reduces heavy PDF files (scans, photos, presentation slides) to compact email-friendly sizes.

👁️ High Visual Quality Preservation

Maintains crisp text, vector typography, and image readability without introducing blurs or artifacts.

Frequently Asked Questions

Will compressing a PDF decrease text sharpness? No. Text streams remain vector-rendered, ensuring fonts remain 100% sharp and readable at any zoom level.

What is the best compression level for email attachments? We recommend the Recommended Compression preset, which yields ~50% size reduction with optimal image quality.