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Home / Blog / How to Reduce PDF File Size without Losing Quality | 7 Ways

How to Reduce PDF File Size without Losing Quality | 7 Ways

By Lena | Follow twitter | Updated on May 9, 2024 | Deutsch
How to reduce PDF file size without losing quality is a frequently asked question. We need to compress PDF files to make them easier to manage and share. In this guide, I’ll tell you all the possible ways to do this.

Reducing PDF file size is not just about compressing the file. We need to ensure that its quality is not damaged. If the quality is compromised, then the file will lose its value. Therefore, finding the right compression method is crucial. It is highly recommended to use a professional PDF tool like SwifDoo PDF to ensure quality!

You can keep reading to learn how to use SwifDoo PDF and other PDF size reducers to optimize PDF without losing quality.

Part 1. Reduce PDF File Size without Losing Quality on PC

Compressing a PDF file is a quick way to reduce its size. Here, we use Adobe Acrobat and SwifDoo PDF as examples to show you how to compress PDF without losing quality.

Optimize PDF Size without Losing Quality via Adobe Acrobat

Adobe Acrobat is a well-known PDF editor that can help users easily handle PDF files. It provides two options to help you reduce PDF file size without losing quality. However, you may need to subscribe to its pro version to enjoy the features.

Compress PDF

1. Open your PDF with Adobe Acrobat Pro DC.

2. Click File in the upper left corner.

3. Choose Save as Other > Click Reduced Size PDF...

Reduce PDF Size via Adobe Acrobat

4. On the pop-up window, adjust the settings and click OK.

Optimize PDF

Adobe Acrobat also allows you to compress specific content to reduce PDF size.

1. Open the file with the tool.

2. Click Tools next to Home > Choose Optimize PDF.

3. Choose Advanced Optimization. Then, you can adjust the image quality, remove unwanted objects, and much more.

4. Click OK to save your changes.

Reduce PDF Size via Adobe Acrobat

Note: To see how much space each element takes up in the file, click Audit Space Usage in the upper right corner. This will tell you what you need to do to reduce the size of the PDF.

Reduce PDF Size without Losing Quality - SwifDoo PDF

SwifDoo PDF is another easy-to-use tool for reducing PFD file size without losing quality. This tool lets you quickly compress PDF files to the size you need.

  • Customized Compression Level. You can choose from 3 compression levels: Low, Medium, and High. In addition, you can adjust the quality of the images in the file.
  • Batch Compression. To save time and energy, SwifDoo allows you to batch compress multiple PDF files simultaneously.

You can click the download button to get SwifDoo PDF and follow the steps below to reduce PDF file size in minutes.

1. Open SwifDoo PDF > Click Compress PDF.

Choose Compress

2. Select Add Files to select the PDF you want to compress.

3. Select the compression level.

Compression Level

4. To compress PDF without losing image quality, you can click Custom to adjust the resolution.

Adjust Image Quality

5. Finally, click Start.

As you can see, with the user-friendly interface, you can easily find the tools you need. During the trial period, you can try all the features, including compression, editing, annotation, page management, password protection, etc.

How to Resize A PDF Image | 4 Proven Methods

How to Resize A PDF Image | 4 Proven Methods

This guide will tell you how to resize a PDF image. Whether you want to make it online or offline, you will find a way to do it here.


Part 2. Reduce PDF File Size without Losing Quality on Mac

You can also use Adobe Acrobat to compress your PDF file size on a Mac computer. However, as mentioned earlier, it requires a license. Actually, one built-in program called Preview can help you reduce PDF size without losing quality.

Preview is designed to help Mac users view images and PDF files. It also allows you to do some simple editing to the file. Below are the steps to compress a PDF file.

1. Right-click the PDF file and choose Open With > Select Preview to open the file.

2. Click File from the toolbar and then choose Export.

3. On the pop-up box, click the drop-down menu next to Quartz Filter.

4. Select Reduce File Size and click Save to make it.

Reduce PDF Size on Mac

Part 3. Reduce PDF File Size without Losing Quality Online

Do not want to install any application on computer? Then, an online tool can be the best way to compress PDF without losing quality. There are many online tools that can help you compress PDF online, such as iLovePDF, Soda PDF, PDF Compressor, SmallPDF, PDF2Go, etc. You can visit the site of the tool and start the compression.

1. Open a browser and go to one online tool you prefer, like iLovePDF.

2. Choose Compress PDF > Then click Select PDF files to upload your file.

3. Choose the compression level and click Compress PDF to start.

Reduce PDF Size Online

Part 4. Other Tips to Reduce PDF File Size without Losing Quality

Here are 3 other practical methods to reduce PDF file size.

Compress Images

Pictures, especially high-resolution ones, can take up a lot of space. You can try to reduce the size of the image, which will reduce the PDF size. This operation has little or no effect on the quality of the PDF.

  • First, you can replace PNG images with JPG images, as they tend to have smaller file sizes.
  • Then, you can use an image compression tool like TingPNG to compress the image. This online tool can help you compress multiple images at one time.

Compress Images via TingPNG

Use “Save As”

When you make changes to a PDF file, you can click Save or Save as to save the document. The "Save As" command will generate a fresh file, while the "Save" feature will integrate any modifications made into the original document. In short, clicking "Save" repeatedly results in a larger file size. However, by using "Save As", the editor can generate a fresh and optimized file.

Remove Unnecessary Objects

Another way to reduce PDF size without losing quality is to delete unnecessary content, such as images, embedded fonts, metadata, or pages.

Final Words

That’s all about how to reduce PDF file size without losing quality. Depending on your needs, you can choose to use a desktop application or an online tool to compress PDF files. Note that uploading files to the web runs the risk of being compromised. For important files, the offline PDF tool is a better choice. In addition, these tools offer more features to meet your needs.

SwifDoo PDF
  • Compress PDF without losing quality
  • Modify, add, delete or replace text/image easily
  • More than a dozen annotation tools to make PDF attractive
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Windows 11/10/8.1/8//7

Lena has been in the editing industry for 8 years. She is familiar with a variety of products that can make things easier, such as PDF tools, video recording software, iOS location changer, etc. She enjoys sharing her knowledge with users to help them solve problems in their work and life. In her spare time, she likes to play with her cat.

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