Compress PDF Files
Reduce PDF file size while maintaining quality. Perfect for email attachments.
Drop a PDF file here or click to browse
Select a PDF to compress. Max 50MB.
Frequently Asked Questions
How does PDF compression work?▼
PDFKit optimizes the internal structure of your PDF — compressing object streams, removing redundant metadata, and re-linearizing the file. This reduces size without affecting visible content quality.
Will compression reduce image quality?▼
No. This compressor optimizes PDF structure, not image content. Text, images, and formatting remain at their original quality. For best results, use PDFs with metadata bloat or complex object tables.
Is it safe to compress PDFs online?▼
Yes. PDFKit processes everything in your browser — your files never leave your device. No data is uploaded to any server.
How much can I reduce my PDF size?▼
Results vary depending on the PDF. Files with heavy metadata, embedded fonts, or bloated object tables can see 10-50% reduction. Already-optimized PDFs may see minimal change.
Is this PDF compressor free?▼
Yes, completely free. No signup, no account, no limits.
Can I compress encrypted PDFs?▼
Password-protected PDFs cannot be compressed without first removing the password. The tool will notify you if a PDF is encrypted.