Free Online Tool
PDF Compressor
Reduce PDF file size with quality presets and download a lighter PDF quickly. This service is 100% free to use.
Limit: 1 PDF file, max 50 MB
Compression Strength
Render DPI
How to Compress PDF
Select one PDF file from your device.
Pick compression strength and render DPI based on your need.
Compress and download your smaller PDF file.
Best Settings Guide
High Quality + 300 DPI: best for readable text and better visuals.
Balanced + 200 DPI: recommended for everyday sharing and email.
Small Size + 100 DPI: best when file size is your highest priority.
Common Errors and Fixes
Password-protected PDF: unlock the PDF first and upload again.
Very large files: use Small Size preset and lower DPI.
No size reduction: try Balanced or Small Size, and reduce DPI.
Complex scanned PDF: compression may take longer due to page rendering.
Privacy and Processing
Your PDF is processed in your browser in this free version. Files are not stored on our server during compression.
Related Tools
Need page images from PDF? Use PDF to JPG. Need image-to-document conversion? Use JPG to PDF. Need image file optimization? Use Image Compressor.
FAQ: PDF Compressor
Is this tool free? Yes, PDF Compressor is free to use.
What is the file size limit? Maximum 50 MB for one PDF file.
Can I upload multiple PDFs at once? No, currently one PDF at a time.
Will this keep exact original PDF structure? Output is optimized by re-rendering pages for smaller size.
Does this work on mobile? Yes, it works on modern mobile and desktop browsers.
Are my files uploaded to your server? No, processing happens in your browser in this version.