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How To Reduce A PDF's File Size In Adobe Reader

PDFs are a universal format for sharing documents, presentations, and other files. But large files can take a long time to upload, download, or email, and they may also use up valuable storage space on your device or server. Fortunately, there are several ways to reduce the weight of a PDF, including using Adobe Reader. This is a popular PDF reader and editor that allows you to reduce a file’s size.

There are many scenarios in which you may need to reduce the weight of your PDFs. For example, you may want to email a document to a colleague, but you prefer to make it smaller first so it’s quicker to send. Alternatively, you may simply be looking to free up some storage space on your device. In either case, reducing the weight of your PDFs in Adobe can be a lifesaver.

With Adobe, in just a few clicks, you can reduce the weight of your documents without sacrificing their quality. Keep reading to find out how to do it quickly and easily! Also, we'll share some tips to apply while compressing your file.

How To Reduce A PDF's File Size In Adobe Reader

Adobe Acrobat offers a powerful tool to reduce the weight of your document, making it more manageable. Here's how to do it:

  1. Open the file in Adobe Acrobat and select "File"> “Save As Other” > “Optimize PDF”. It will open the "PDF Optimizer" dialogue box.
  2. In the "PDF Optimizer" dialogue box, select the "Make compatible with" drop-down list and choose the version of Acrobat or Reader that you want the optimized PDF to be compatible with.
  3. Under the "Images" section, choose "JPEG" as the compression type and adjust the image quality as needed. Reducing the image quality will result in a smaller file, but remember that it may also affect the visual quality.
  4. Under the "Fonts" section, select "Subset fonts when the percentage of characters used is less than" and set the percentage to "100%". It will only embed the fonts used in it.
  5. Click the "Audit space usage" button to see a breakdown of your document's weight by element type. It can help you identify areas of the PDF that can be optimized further.
  6. Once you’re satisfied with the settings, click the "OK" button to save the optimized PDF.


What You Need To Know About Reducing A PDF's File Size In Adobe Reader

When reducing the weight of a PDF in Adobe, here are some things to keep in mind:

  • Remember that reducing the size of a PDF will result in a loss of quality. Therefore, you need to balance its size versus its quality for your needs.
  • Adobe Acrobat has various tools for reducing the file size of a PDF. The most commonly used ones are "Reduce File Size" and "Optimize PDF". Make sure you choose the tool that’s appropriate for you.
  • One of the most significant factors in a PDF’s file size is the resolution of its images and graphics. Consider reducing the resolution of images to reduce the file’s overall weight.
  • PDFs can contain a lot of unnecessary data that increases its file size, such as comments, bookmarks, metadata, and hidden elements. Consider removing any data that isn’t necessary from the document.

After you’ve reduced the size of your PDF, examine the document thoroughly to ensure that it still satisfies your requirements. It's better to catch any issues before sending the document to its intended recipient.

Which Operating Systems Allow You To Reduce A PDF's File Size In Adobe Reader

With a few simple steps, you can reduce the size of your PDF document without compromising its quality. Whether you’re sharing essential reports or uploading resumes, optimizing your file can make a huge difference. So, let's dive in and discover how to reduce a PDF's size on different computer and mobile operating systems.

Reduce A PDF's File Size in Adobe Reader On A PC

In this guide, we'll show you how to reduce a PDF's size on your PC in just a few clicks. Let's get started!

Windows 10 And Prior Versions Of Windows

To reduce the dimensions of a PDF in Adobe on Windows 10 or prior versions, follow these steps:

  1. Open the file in Adobe Reader.
  2. Go to file, select “Save As Other”, and choose “Reduced Size PDF”.
  3. Select the version of Acrobat compatibility you require and click “OK”.
  4. Save it with a new name to avoid overwriting the original.


Compressing a PDF in Adobe Reader on a Mac is straightforward. You can follow the steps mentioned above to carry out the task.

However, there are other ways to reduce your file’s weight on Mac. For example, you can use the in-built "Preview" program or reputed online tools such as Compress PDF by FormatPDF.


If you want to reduce your file size on Linux, using Adobe Reader works well. Open your PDF in Adobe Reader, select "Save As Other," and choose "Reduced Size PDF." From there, adjust your compression settings, hit "OK," and voila! A smaller file without sacrificing quality. Try this quick and easy solution.

Reduce A PDF's File Size In Adobe Reader On A Smartphone Or Tablet

If you want to reduce the size of your files while on the go, Adobe Reader has got you covered! With just a few clicks on your smartphone or tablet, you can compress large PDFs to make them more manageable.


If your Android device struggles to handle large files, you can quickly reduce their size using Adobe! Open the PDF in Adobe Reader, select "Optimize PDF" from the menu, and choose the level of compression you desire. With just a few taps, you can reduce the dimensions of your PDFs.

iPhone (iOS) Or iPad

Like Android, you can also compress your file on your iPhone or iPad using Adobe Reader. However, if you want, you can also download and install various apps to do this from the Apple App Store. Search for "PDF compressor" and choose an app with good ratings and reviews.

Husain has been around the internet ever since the dial-up days and loves writing about everything across the technosphere. He loves taking tech apart and see what makes them tick, without necessarily putting it all back together.
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