Compress PDF
Reduce file size while preserving quality. Choose your compression level.
Drop PDF file here or click to upload
Select a single PDF file
How to Compress PDF Files Online
Reduce the file size of your PDFs without sacrificing quality. CloudPDF's compression tool optimizes images and removes unnecessary data to make your PDFs smaller — perfect for email attachments, web uploads, or saving storage space.
- Upload your PDF file to the compression tool
- Choose your compression level (basic, strong, or maximum)
- Click "Compress PDF" to reduce the file size
- Download your optimized PDF file
Frequently Asked Questions
How much can I reduce my PDF file size?
Compression results vary depending on the content. PDFs with many images can often be reduced by 50-80%. Text-heavy PDFs with few images may see smaller reductions.
Will compression affect my PDF quality?
Basic compression preserves nearly identical quality. Higher compression levels may slightly reduce image quality, but text and vectors remain crisp at all levels.
Is there a file size limit for compression?
Since CloudPDF runs in your browser, file size limits depend on your device's available memory. Most modern devices handle files up to several hundred MB without issues.