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How to Reduce PDF File Size in Mac Preview?

by Stéphane Turquay

Having trouble with large PDF files on your Mac? They can slow your workflow, eat up storage, and make sharing via email or cloud platforms a hassle.

While Mac’s native Preview app offers basic tools to reduce PDF file size, it often involves multiple steps and can compromise the quality of your document. That’s where Compress PDF, our leading online tool, steps in to simplify the process.

By the end of this guide, you’ll learn how to reduce PDF file size on your Mac, how to preserve quality, and why Smallpdf is the go-to solution for PDF compression.

The Problem with Using Preview to Reduce PDF File Size on Mac

Many Mac users turn to Preview when trying to reduce PDF file size. And while it does offer a built-in “Reduce File Size” option, it comes with some limitations:

  • Quality Loss: Preview compresses PDFs by lowering the resolution of images, which could result in blurry visuals.
  • Lack of Adjustments: There’s no option to control the level of compression to suit your needs.
  • Manual Process: The steps can be cumbersome and time-consuming.

If you’ve tried Preview and found the results unsatisfactory, it’s time to use a tool designed for PDF perfection. Let's explore how Smallpdf can solve this.

Why Use Smallpdf?

With Smallpdf, compressing PDFs is fast, simple, and effective. Here’s why our tool is better:

  • Quality Preservation: Our advanced algorithm compresses your file without compromising on quality.
  • User-Friendly: No steep learning curve. Just drag, drop, and you’re done!
  • Flexible Compression Options: Choose between Basic (free) and Strong (Pro) levels of compression to fit your needs.
  • Secure and Reliable: We ensure privacy with encryption and delete your files automatically after an hour.

Now, let's break it down step by step.

How to Reduce PDF File Size on Mac Using Smallpdf

Follow these simple steps to shrink your PDF file in minutes:

1. Access Smallpdf’s Compress Tool

Open your web browser and head over to our Compress PDF. No installations or setups are needed.

2. Upload Your File

Drag and drop your PDF into the upload section, or click "Choose File" to select the document from your Mac’s storage. Got files stored in Google Drive or Dropbox? No problem—Smallpdf integrates seamlessly with both.

3. Choose Your Compression Level

Once your file is uploaded, you’ll see two options:

  • Basic Compression (Free): Reduces file size with little to no visible quality loss.
  • Strong Compression (Pro): Offers maximum size reduction while maintaining high quality. Perfect for larger files or professional use.

Select the option that best fits your needs.

4. Compress Your PDF

Click the “Compress” button. Smallpdf will optimize your document by reducing redundant data and re-encoding images while ensuring your text and layout stay intact.

5. Download or Share

Once compressed, download your optimized PDF to your Mac. You can also share it via email or create a shareable link for others to access.

Compress Your PDF For Free

Compress Your PDF For Free

Why Smallpdf Stands Out

Our Compress PDF tool offers more than just convenience. Here’s what makes us unique:

  • Security First: Your files are encrypted and deleted after one hour, ensuring complete privacy.
  • Cross-Platform Compatibility: Use Smallpdf on Mac, Windows, Linux, iOS, or Android.
  • Trusted by Millions: Over a billion users trust Smallpdf to handle their documents.

Your PDFs, Optimized Effortlessly

Gone are the days of spending hours trying to figure out how to reduce PDF file size on Mac with manual tools.

Whether you’re working with personal files, professional documents, or academic content, Smallpdf has your back. With our guided simplicity, you’ll save time, storage space, and frustration!

Frequently Asked Questions

How to reduce PDF size in Preview?

Open your PDF in Preview, click File > Export, and select Reduce File Size in the Quartz Filter menu. However, you’ll often notice a drop in quality with this method.

How do I reduce the size of a PDF in Adobe Mac?

With Adobe Acrobat, go to File > Save as Other > Reduce File Size. While effective, Adobe Acrobat requires a subscription. Smallpdf offers an easier and free alternative.

How do I reduce the MB size of a file on a Mac?

Upload your file to Smallpdf, select the desired compression level, and download your newly reduced file size. It’s fast, secure, and preserves quality.

How do I decrease a PDF file size?

The easiest way is to use Smallpdf’s Compress PDF. Simply upload your file, choose the compression level, and download your optimized document.

Stéphane Turquay – Principal Product Manager at Smallpdf
Stéphane Turquay
Principal Product Manager @Smallpdf