Private by design
Your PDFs never leave your computer. There is no account, cloud service, analytics, or telemetry.
Fast & Simple · Open source · Local only
Free PDF Compressor
for your desktop.
FS PDF Compressor is a free, open-source, offline PDF compressor for macOS Apple Silicon, Windows, and Linux. FS means Fast & Simple: drop in a PDF and get a smaller one—without uploads, accounts, or complicated settings. Compress PDFs without uploading them, with a signed and notarized Mac app, Windows installer, Snap Store install, or self-contained Linux AppImage.
One simple job
Drag one PDF, several PDFs, or a folder into the app—or use the optional Drop Zone without reopening it. 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.
Available now · Version 1.0.13
A lighter app while you work.
This small maintenance release reduces memory used while FS PDF Compressor is open and waiting for files. Compression, privacy, and the three quality profiles work exactly as before.
- Reduced macOS idle memory by deferring the full update framework until it is needed.
- Kept Sparkle's signed update verification and manual Check for Updates action intact.
- Reduced temporary memory use for large selections, diagnostic output, and completed Linux workers.
- Windows x64 is now available with an Explorer action, desktop Drop Zone, installer, portable ZIP, and published checksums.
The essentials
What you need to know.
A small app should not require a long explanation. These are the facts that matter before downloading FS PDF Compressor.
- What is FS PDF Compressor?
- FS PDF Compressor is a free, open-source desktop app that compresses PDF files locally with Ghostscript. The name means Fast & Simple.
- Can I compress PDFs without uploading them?
- Yes. PDF contents never leave your computer. The app has no account, cloud processing, analytics, telemetry, or subscription.
- Which computers are supported?
- FS PDF Compressor supports macOS 14 or later on Apple Silicon, Windows 11 x64, and x86_64 Linux through Snap or a self-contained AppImage.
- Can I control compression quality?
- Yes. Balanced is the default profile, with Preserve and Maximum available when quality or file size matters more.
- What is Drop Zone?
- Drop Zone is an optional desktop target that compresses PDFs without reopening the main window. It is shown on first launch on Windows; closing the main window leaves it available. On macOS, enable or disable it from FS PDF Compressor → Show Drop Zone. On Linux, use Application → Show Drop Zone; Wayland compositors may present it as a normal floating utility because they control window placement and stacking.
- What happens to the original PDF?
- The original is replaced only when the compressed result is smaller. On Windows, the replaced original is moved to the Recycle Bin; Keep original mode creates a separate compressed copy instead.
- Is the app safe to install?
- The macOS DMG is Developer ID signed and notarized by Apple. Linux and Windows downloads are published with SHA-256 checksums. The Windows installer is currently unsigned, so verify its checksum before installing.
First launch
Ready to open.
The macOS app is Developer ID signed and notarized by Apple. On Linux, install from Snap Store or use the self-contained AppImage. On Windows, verify the published checksum for the unsigned per-user installer.
macOS
- 1 Download the DMG
- 2 Drag the app to Applications
- 3 Open the app
Linux
- 1 Install from Snap Store, or download the AppImage
- 2 Snap updates automatically; AppImage stays portable
- 3 Open it—nothing else to install
Windows
- 1 Download the x64 installer and matching checksum
- 2 Verify the checksum, then run the per-user installer
- 3 Use Explorer's Compress action or the Drop Zone
Drag, drop, done.
Free and open source under AGPL-3.0-or-later.