Compress PDF Files Instantly
Reduce the file size of your PDF documents while keeping maximum document quality. No file size limits, no watermarks, and guaranteed absolute privacy.
How to Compress PDFs
Upload File
Drag and drop the PDF you want to compress into the box above, or click to select a file from your hard drive.
Select Quality
Choose between maximum compression for the smallest file size, or high quality for better readability.
Compress & Download
Click the compress button. Your optimized PDF will be processed locally and downloaded automatically.
Why trust PDFsHero for compression?
Unmatched Privacy
Unlike traditional cloud compressors, we use WebAssembly to shrink files directly on your machine. Your private documents are never sent across the internet to external servers.
Zero Latency
Because there is no upload process, your files are compressed instantly. Bypass slow network speeds and experience the power of desktop software right in your browser tab.