Forum Discussion
How to compress a pdf file on mac without losing quality
Hello everyone,
I have a PDF file on my Mac that is too large to upload and share. The document contains a mix of text, images, and a few graphics, so I would like to shrink the PDF file size while keeping everything clear and readable.
I know that macOS Preview has a built-in PDF compression option, but I've heard that it can sometimes reduce image quality too much. As a beginner, I'm looking for the best way to compress a pdf file on mac without noticeable quality loss.
What tools or methods do you recommend for compressing PDF files on a Mac while maintaining good image and text quality?
If you need to compress a PDF without noticeably reducing its quality, PDFZin is a good option.
https://www.bincodelab.com/compress-pdf-files
It helps shrink the file size while keeping text, images, and page layout clear, which is useful for emailing, uploading, or storing large PDF documents.
11 Replies
Preview, Mac’s native preinstalled app offering a free built-in workflow to carry out how to shrink pdf file size mac without third-party downloads, often over-compresses embedded images via its fixed compression filter and lacks customizable compression settings for graphic-heavy PDFs.
How to shrink PDF File Size Mac
Step 1: Open the target PDF file in Preview.
Step 2: Click File → Export in the top menu bar.
Step 3: Check the “Encrypt” checkbox.
Step 4: Expand the Quartz Filters drop-down menu and select the “Reduce File Size” preset.
Finally, click Save to save the new, compressed, smaller PDF file.
The built-in preview workflow completely solves the problem of reducing the size of PDF files on a Mac to meet everyday needs. It works well for simple text-based PDFs shared via email, but is not recommended for high-resolution graphic PDFs that require clear image output.
Pros:
- Pre-installed on all Mac devices,
- No watermarks, and fast PDF compression
- Supports offline use without an internet connection
Cons:
- The “Reduce File Size” filter compresses images too aggressively, causing photos and graphics to become blurry
- No custom compression slider to balance file size and visual quality
- For plain-text PDFs with few images, the reduction in file size is minimal
