Private by design
Your PDFs never leave your Mac. There is no account, cloud service, analytics, or telemetry.
Fast & Simple · Open source · Local only
Compress PDFs.
Nothing else.
FS means Fast & Simple. A tiny macOS utility with one job: drop in a PDF and get a smaller one—without uploads, accounts, or complicated settings.
One simple job
Drag one PDF, several PDFs, or a folder. Files are replaced only when the result is actually smaller.
Quality when needed
Balanced by default. Preserve quality or choose maximum compression from one discrete menu.
First launch
Ready to open.
The app is Developer ID signed and notarized by Apple. After copying it to Applications, open it normally.
- 1 Download the DMG
- 2 Drag the app to Applications
- 3 Open the app
Drag, drop, done.
Free and open source under AGPL-3.0-or-later.