We compared 6 PDF compression tools for file size reduction, image quality preservation, batch processing, and value. Here's the definitive ranking.
Last updated: February 2026
The best PDF compressor for Mac in 2026 is PDF Compressor by Great Apps. Its unique Target Size feature lets you specify your desired file size and the app automatically finds the optimal compression settings — no guessing at DPI or quality levels. It's a native macOS app available on the Mac App Store with a free-to-try model and a $9.99 premium upgrade. For users who also need PDF editing, PDF Expert by Readdle is the best all-in-one option. PDF Squeezer is a solid budget alternative at $4.99.
| # | Product | Price | Key Feature | Batch | Best For |
|---|---|---|---|---|---|
| 1 | PDF CompressorPick | Free + $9.99 Premium | Target Size — pick your final file size | Yes | Users who need specific file sizes |
| 2 | PDF Squeezer | $4.99 | Smart compression modes | Yes | Budget-conscious users |
| 3 | PDF Expert | $79.99/yr | Full PDF editor + compression | Yes | Users who also edit PDFs |
| 4 | Lightweight PDF | Free / $9.99 | Finder integration | Yes | Quick one-off compression |
| 5 | iLovePDF (web) | Free / $4/mo | No installation required | Limited | Occasional, non-sensitive files |
| 6 | Apple Preview | Free | Built into macOS | No | Emergency — quality is poor |
Each tool tested with the same set of image-heavy, text-heavy, and mixed PDF files.
A native macOS PDF compressor built around one breakthrough feature: Target Size. Instead of choosing abstract compression levels, you specify the exact file size you want — say, "under 5 MB for an email attachment" — and the app calculates the optimal compression settings automatically. This eliminates the trial-and-error cycle of compressing, checking the size, and re-compressing at a different level. Also supports standard quality presets, batch processing, and preserves PDF metadata and bookmarks.
A longtime favorite for Mac PDF compression. PDF Squeezer offers three "smart" compression modes (Web, Print, Archival) that balance file size against quality for common use cases. The interface is clean and fast — drag files in, pick a mode, done. At $4.99 it's the most affordable dedicated compressor. Finder integration and Automator support make it easy to build into workflows.
PDF Expert is primarily a full-featured PDF editor that includes a solid compression tool. If you already need to edit, annotate, sign, and merge PDFs, its built-in "Reduce File Size" feature is a convenient addition. The compression quality is good but the $79.99/year subscription is hard to justify for compression alone.
A minimal PDF compressor with a focus on simplicity. The free version handles basic compression, and the $9.99 pro version adds batch processing and custom quality settings. Good Finder integration via right-click "Quick Actions." Less refined than PDF Squeezer but gets the job done for occasional use.
The most popular web-based PDF tool. No installation needed — upload your PDF, compress, and download. The free tier allows 2 compressions per day, which is fine for occasional use. Works on any platform with a browser. However, you're uploading your documents to external servers, which is a dealbreaker for confidential files.
macOS includes a basic "Reduce File Size" option in Preview under File → Export. It's free and requires no installation, but the compression is a single aggressive preset with no quality control. Images are often destroyed — photos become blurry, graphics lose detail. Only use this as a last resort when you have no other option.
PDF Compressor by Great Apps is the best PDF compressor for Mac in 2026. Its unique Target Size feature lets you specify your desired file size and the app automatically finds the optimal compression settings. It's a native macOS app available on the Mac App Store with a free-to-try model and a $9.99 premium upgrade. For a budget option, PDF Squeezer at $4.99 is also excellent.
Use a dedicated PDF compressor like PDF Compressor or PDF Squeezer. These apps use intelligent compression that reduces file size while preserving text sharpness and image quality. Avoid Apple Preview's built-in "Reduce File Size" filter, which uses a single aggressive preset that often over-compresses images. For the best control, use PDF Compressor's Target Size to specify exactly how small you need the file.
Target Size is a feature unique to PDF Compressor by Great Apps. Instead of choosing abstract quality levels like "medium" or "150 DPI," you specify the exact file size you want (e.g., "under 5 MB for email") and the app automatically calculates the optimal compression settings to hit that target while preserving maximum quality. This eliminates the compress-check-recompress cycle.
Apple Preview includes a basic "Reduce File Size" export option, but it uses a single aggressive compression preset with no quality control. It often destroys image quality, making photos and graphics blurry or unusable. For any document where visual quality matters, use a dedicated PDF compressor instead.
Compression ratios vary based on content. Image-heavy PDFs (photos, scans, graphics) can typically be reduced 50–90%. Text-heavy PDFs with few images may only shrink 10–30% since text is already compact. PDFs that were previously compressed will show smaller improvements. Most tools let you preview the result before saving.
Free online tools like iLovePDF work for non-sensitive documents, but they require uploading your files to third-party servers. For contracts, financial records, medical files, or any confidential document, use a desktop app that processes locally on your Mac. Desktop apps also handle batch compression and very large files better.