Compress PDF Online — Reduce File Size Free
Shrink PDF files by up to 90% for email and uploads, processed entirely in your browser. Free, private, no watermark.
🔒 Files are processed on your device — nothing is ever uploaded to a server
Scanned documents especially can shrink dramatically. Choose a compression level to balance size and sharpness, and preview before downloading.
How it works
- Open the PDF you want to shrink.
- Pick a compression level — light for print, strong for strict upload limits.
- Compare the new size and download.
Why MyPDF
- Truly private — Everything runs inside your browser. Your files are never uploaded, stored, or seen by anyone — unlike most online PDF sites.
- Free with no sign-up — No account, no daily limits on core tools, no watermarks added to your files.
- Fast — No upload/download round-trip to a server. Large files start processing instantly.
- Works everywhere — Any modern browser on Windows, Mac, Linux, Android, or iPhone. Installable as an app (PWA).
FAQ
How much smaller will my file get?
Scanned PDFs typically shrink 50–90%. Text-only files that are already small compress less.
Is it safe for confidential documents?
Yes. Processing happens locally in your browser (client-side). You can even disconnect from the internet after the page loads and most tools keep working.
📖 Full guide: Compress a PDF so it fits in email