PDF Compressor
How to Compress a PDF
Drag and drop or browse. Maximum 50 MB.
Ghostscript optimizes images and removes unnecessary data.
Download and compare file sizes. Typical reduction: 40-80%.
How PDF Compression Works
PDF compression optimizes internal structure by recompressing images at screen-suitable resolution, removing duplicate fonts, stripping metadata and thumbnails, and linearizing the file. Typical compression ratios range from 40-80% depending on whether the original contains uncompressed images (highest savings) or is already optimized.
When to Compress PDFs
Email users compress to fit attachment limits. Students meet university upload restrictions. Web developers reduce downloadable PDF bandwidth. Archivists compress document collections. Business professionals compress reports for Slack and Teams upload limits.
Frequently Asked Questions
How much smaller will my PDF be?
Typical compression: 40-80%. PDFs with large images see the biggest reduction.
Will compression reduce quality?
Images are optimized for screen viewing (150-200 DPI), suitable for digital use and most printing.
Are files secure?
Uploaded over HTTPS, compressed with Ghostscript, auto-deleted within 1 hour.
Can I compress scanned PDFs?
Yes. Scanned PDFs often see the greatest improvements — sometimes 70-90% reduction.