Processed on your device — never uploaded
Compress PDF
Shrink file size while keeping quality
Drop a file here, or browse
.pdf — processed on your device, never uploaded
How it works
- 1
Drop the PDF you want to shrink.
- 2
Choose a compression level (and optional grayscale).
- 3
Compare the before/after size and download the smaller file.
Why FoldPDF
- Files processed 100% locally — verifiable in DevTools
- No file size or daily usage limits
- No watermarks, no accounts, no paywalls
- Works offline once loaded
Frequently asked questions
Is this compress pdf tool really free?+
Yes — every FoldPDF tool is free with no file limits, watermarks, or sign-up. Processing runs on your own device, so it costs us nothing to serve.
Are my files uploaded to a server?+
No. Files are processed entirely inside your browser using WebAssembly. You can verify with your browser's developer tools that no file data is transmitted.
How does compress pdf work?+
Reduce PDF file size by re-encoding embedded images to efficient JPEG and removing unused objects. Pick a quality level and preview the savings before download.