How much can I reduce PDF file size with compression?

Compression results vary based on PDF content. Documents with large images can typically be reduced by 50-70%, while text-heavy PDFs may see 20-40% reduction. The actual compression depends on the original quality and content type.

Will compressing my PDF reduce image quality?

Our compression algorithm balances file size reduction with quality preservation. Images are optimized using smart algorithms that maintain visual quality while reducing file size. For most use cases, the quality difference is imperceptible.

Is there a file size limit for PDF compression?

No. You can compress PDF files of any size. However, very large files (over 100MB) may take longer to process in your browser depending on your device specifications and available memory.

Can I compress multiple PDFs at once?

Currently, the tool compresses one PDF at a time to ensure optimal performance and quality. For batch processing, you can compress files sequentially without any limits on the number of files processed.

Do you store my PDF files after compression?

No. All compression happens entirely in your browser using client-side processing. Your PDF files never leave your device and are automatically discarded from memory after you download the compressed version.

What happens to PDF metadata during compression?

PDF metadata (title, author, creation date, keywords) is preserved during compression. Only file size is reduced by optimizing images and removing redundant data, while all document properties and structure remain intact.

Compress PDF Online Free - Reduce PDF File Size

How to Compress PDF Files

Upload your PDF file
Click the "Compress PDF" button
Wait for compression to complete
Download your compressed PDF file

PDF Compression Features

Smart Compression: Optimizes images and removes redundant data
Quality Preserved: Minimal visible quality loss
Email-Friendly Sizes: Reduce 50MB files to under 10MB
Fast Processing: Compress large files in seconds
No File Limits: Compress files of any size
Browser-Based: No software installation required

Why Compress PDF Files?

PDF compression is critical for reducing file size while maintaining readability. Scenario: You scan a 50-page proposal with images—the PDF is 45MB. Most email servers reject attachments over 25MB. Compress it to 8MB and send successfully without quality loss.

Common use cases: Meeting email attachment limits (typically 10-25MB), reducing cloud storage costs, speeding up file transfers, optimizing website PDFs for faster page loads, preparing documents for mobile viewing, and archiving large document collections efficiently.

Real example: Marketing teams compress product catalogs from 80MB to 12MB before emailing to clients. The compressed version loads 6x faster, fits within email limits, and looks identical on screen—clients get the same information without download frustration.

Privacy & Security

All PDF compression happens locally in your browser. Your files are never uploaded to servers, stored in databases, or transmitted over the internet. The compressed PDF is generated on your device—complete privacy and security guaranteed.