Compress PDF
Reduce PDF size with adjustable quality, all in the browser.
Drag & drop files here, or click to select
How to Compress PDF Files Online
Drag and drop or select your PDF file from your device folder.
Select your preferred compression rate (low, medium, or high).
Wait a moment for the local in-browser process to shrink the size.
Download your smaller, optimized PDF document.
Why Compress PDFs with SonuPDF?
Client-Side Compression
The file size reduction is computed fully inside your web browser. No remote servers receive or process your data.
Multiple Compression Presets
Choose from high, recommended, or low compression levels to balance output quality and file size perfectly.
Quick File Processing
Shrink large documents in seconds because the computation happens locally on your machine.
Preserve Document Integrity
Optimize fonts and image settings while maintaining readable text and structure.
Frequently Asked Questions
Standard text is preserved. Only high-resolution images are optimized to reduce file footprint based on your chosen preset.
Since the tool operates client-side, the limit depends on your computer memory and browser capabilities.
Yes. Your documents never leave your computer, ensuring complete confidentiality.
No, SonuPDF retains original document metadata unless you choose to edit or remove it separately.