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2 Ways to Compress PDF Files Without Losing Quality

When you compress PDF files, you're essentially reducing their footprint or their size to make them smaller. This, in turn, makes it easy to share on social media, websites, through email and chat, and so on. So what are the best tools to compress PDF to 100KB or minimize PDF size to whatever you want? Let's have a look.

Way 1. How to Compress a PDF File with UPDF

UPDF is a powerhouse PDF editor that you can easily use to compress a PDF file and reduce the file size. You can also annotate, edit, and organize PDFs with this versatile and fun utility. But most of all, you can download it and begin to compress your PDF file conveniently.

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compress pdf to 100kb with updf

UPDF gives you ultimate control when you want to compress a PDF by allowing you to simply save a smaller version of the file. It is also very easy to use, just follow these simple steps;

Step 1: Download and Install UPDF

If you don't already have UPDF on your computer, download and install the latest version of the program from the main website. Once the installation process is complete, double-click on the UPDF icon to launch the application.

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Step 2: Open the PDF Document You Want to Compress

UPDF gives you several options to open the PDF document that you'd like to work on. You can drag and drop the file onto the main interface to open it automatically or you can open it manually by clicking on the "Open File" icon and selecting the file.

Step 3: Compress the PDF File  

When the document is open in UPDF, you will see a set of tools both on the left and right of the document. The tool needed to compress the file and reduce its size will be available on the right panel.

Click on the "Save As Other" icon and in the options that appear, select "Reduce File Size..."

compress pdf with updf

Step 4: Choose the Compression Level

Choose the level of compression you want and the file size you would like to have. If you want the compressed file size to be smaller, you can choose "Low". On the contrary, if you want to compress the PDF with better quality, the file size can not be so small, you can choose "Maximum". The file compression size options from left to right are compressed smaller and smaller. Actually, UPDF can ensure quality for all the 4 levels.

save and compress pdf file

Click on "Save As" and UPDF will allow you to choose a folder and a file name for the new version of the document. The PDF will be saved to your selected folder but will now be in a reduced size, allowing you to share the PDF document with others more easily.

Video Tutorial on How to Compress PDF

Other Key Features of UPDF

  • PDF Editing (Text, Images, and Links): UPDF is a powerful and user-friendly PDF editor that lets you take control of your PDF workflows. You can easily edit(add or delete) text, images, and links as you need.
  • PDF Annotation: The excellent markup tools allow you to review and comment on documents, highlight content, add notes, draw shapes, apply preset shapes, and do a lot more. Communicate clearly and concisely with a full range of annotation tools.
  • Organize PDF: The page management module lets you reorder pages, replace them, rotate them, copy them, and extract them to a new PDF. This is another way to compress PDFs because you can simply extract what you need into a smaller file that's easier to share.
  • UPDF AI: UPDF also offers robust AI technology along with multi-dimensional editing features. You can summarize, translate, explain, and analyze PDF documents easily.

The attractive UI of UPDF has been designed for modern PDF users who need robust functionality but wouldn't mind a bit of fun mixed in. UPDF provides this through thoughtful design, attractive color schemes, and a fluid user interface. So click the "Free Download" button to take benefit from its features.  

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Way 2. How to Compress PDF in Adobe Acrobat

Acrobat DC is a high-quality tool to compress PDFs and perform literally hundreds of other tasks. It is as versatile as it is expensive, unfortunately, but if you're dealing with heavy PDF workflows, it's well worth the money. Here's how to compress PDFs using Acrobat DC.

  1. In the Acrobat window, select Open under "Tools" → "Optimize PDF".
  1. Choose the file to import into Acrobat.
  1. Click the "Advanced Optimization" option, and choose the proper image, font, transparency, and other settings within the pop-up dialog that appears.
  1. Finally, click "OK", rename the file, and save it to your desktop.
compress pdf with adobe

Comparing the 2 Ways to Compress PDFs

Compress PDF files to make better use of PDF files. We have introduced two tools to compress PDF files. Which method would be better? We have a comparison table here to see the difference between the two. UPDF's simple and clear interface contrasts sharply with Adobe Acrobat's complex pages.

UPDFAdobe Acrobat
SystemWindows, Mac, iOS, and AndroidWindows, Mac, iOS, and Android
InterfaceSimple, user-friendly, and beautifulComplex
Difficulty of useEasyDifficult
Compress PDF
Convert PDF to CSV, BMP, and GIF

According to the table, it will find UPDF is much better. Here are some tips on why UPDF is better:

  • Adobe Acrobat's interface is too complicated and not friendly enough for novices. The usage of each function is not clear enough, and users need to explore and research by themselves. UPDF's simple and easy-to-understand interface is much more friendly to novices. There will also be a brief introduction when you use it for the first time. But it's actually so simple that you don't need a user guide.
updf vs adobe acrobat
  • Adobe Acrobat is very slow to open large files. It is also very slow when compressing large PDF files. This means less efficiency. But UPDF does not have this problem, it can open large files quickly and compress PDF files quickly.
  • Adobe Acrobat Pro DC needs $239.88 for one year. It is too expensive to compress a PDF file. UPDF only takes $35.99 for one year. It is much cheaper than Adobe Acrobat. UPDF compressing feature is also powerful. What's more exciting? UPDF is now on a big sale to its users, and you can get an exclusive discount now. Upgrade now before it expires.

Also Read: How to Reduce PDF Size? (5 Best and Powerful Ways)

The Benefits of Compressing PDF Files?

Easy to Share: When you need to send a document on mobile via chat or a messaging app, file size limits are often a problem. Compressing your file will help it go through without a hitch.

Easy to Upload: If you need to upload your PDFs to the web, lower file sizes will make the process go faster. It's also easier for others to view or download the file from the web.

Easy to Archive: For storage purposes, it's essential to compress PDFs because memory is usually a premium in most scenarios, and compressing your PDF archive files will let you store more data in a fixed amount of space.

With so many benefits, why not compress PDFs starting today? It makes them easier to manage and you can work with larger PDF workloads if you compress them for various purposes before using them.

FAQs about Compressing PDF Files

Q1. Will compressing PDF files affect the quality?

Compressing PDF files typically reduces file size by removing unimportant aspects from the document. However, it is possible that such compression may slightly lower image quality. Nevertheless, the impact on overall document quality is often minimal, and the size reduction can be advantageous for storage and sharing.

Q2. Can I compress a PDF by 90%?

You can achieve a 90% compression for a PDF file, depending on the content present in it. If the document contains large images, such a PDF reduction is possible in this case. Conversely, if the PDF is predominantly comprised of plain text, carrying out a 90% size reduction is challenging due to the limitations in compressing textual data.

Q3. How to Compress PDF to a Chosen Size?

UPDF has four different document qualities for you to choose from. It has "Maximum", "High", "Medium", and "Low" four options. It will appear the compressed size of the PDF when you click the option.

Q4. How to Shrink PDF in iLovePDF?

Instructions: If you want to compress PDF files using iLovePDF, visit their website on your favored browser. Then, select the "Compress PDF" tab on the top menu of your screen to access a new window. Press the "Select PDF Files" button here and upload the PDF you want to compress. Now, choose the "Compression Level" and finally hit the "Compress PDF" button to download this compressed PDF file on your system automatically.
However, using iLovePDF to shrink PDF has some restrictions. It will restrict the size of the PDF file, and the quantity of the file. The safe of using iLovePDF is also a problem. Uploading PDF files to the website may leak your information. The offline compressor will be safer.

Q5. How to Compress PDF Online in Smallpdf?

To compress the PDF file in Smallpdf, click the "Tools" drop-down menu on its main interface. Choose the "Compress PDF" option from the "Convert & Compress" section on this menu. Press the "Choose Files" button to upload your PDF document on the server of this tool. Once the document is uploaded, hit the "Download" button to save this compressed PDF on your device.
However, there are some limitations of Smallpdf. If you want strong compression it needs to upload to the pro version. If you use basic compression, it can only compress 40% of the PDF.

Q6. Should you prefer online tools over offline ones for PDF compression?

No, you shouldn't prefer online tools for PDF compression, as they pose several security issues when you upload personal documents on them. Moreover, you will also face file size limitations while compressing PDFs with this tool. So, we highly recommend you make use of offline tools such as UPDF to reduce PDF size in an optimized manner.


Compressing PDFs can make it more convenient to share files. However, it is not an easy thing to compress PDFs without losing quality. In this article, we have introduced 2 methods to compress PDFs. If you want us to recommend the best one for you, it is absolutely UPDF. You can select the different compressed file sizes of the PDF to reduce PDF files. The beautiful UI interface is also the best experience to use a PDF compressor. If you want to compress your PDF and experience the excellent document editing features of UPDF, download the tool with this "Free Download" button.

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