How to Compress PDFs in Windows 10

Adobe’s Portable Document Format (PDF) is a universal document format that can be opened on any platform using one of the many free or commercial PDF viewers available.

It’s a very common format for sending documents via text or email as the recipient should always be able to read it. However, PDFs can be quite large, especially if they have a lot of graphics or videos. This can cause some issues when trying to send PDFs via email due to limits on attachment sizes.

Additionally, storing large PDFs on your computer can take up excessive amounts of storage space. As a result, you might be interested in learning how you can easily compress PDFs in Windows 10 in order to save storage space.

Fortunately, there are many tools available online that make compressing PDFs as quick and easy as possible. In this brief tutorial, I will show you how to use three of these free tools so that you don’t have to worry about your PDFs taking up too much space anymore.

How Do I Reduce the Size of a PDF File in Windows 10?

Ready to learn how to easily compress PDFs in Windows 10?

For this tutorial, we’ll be focusing on three tools in particular: 4dots Free PDF Compressor, Smallpdf, and iLovePDF. The first option is a free and easy-to-use program while the latter two offer a way to compress PDFs online without installing any additional software.

Let’s take a look at how you can use these tools to easily compress PDFs in order to save storage space on your computer.

4dots Free PDF Compressor

4dots Free PDF Compressor is a freeware package you can add to Windows 10, and earlier iterations of Windows, from this page. To install the program, press the DOWNLOAD NOW button on the page.

Once the download is complete, open the application and walk through the installation process to get started.

PDF compress2

Once 4dots is installed, it’s time to compress your PDF.

You can select either Add File(s) and Add Folder to open a specific PDF or a folder that contains them. Once you upload a file, it will open the PDF in the program, as shown in the image below. Note that you can also compress a batch of PDFs with this software, so you don’t have to waste time doing one at a time.

PDF compress

Select an output folder, or path, by pressing the folder button at the bottom of the window. If you don’t choose a specific folder, it will save the compressed PDF in the same path as the original. Click the Compress Images checkbox and drag the bar further right to retain more image quality. This will make sure that your images don’t come out blurry.

Then, press the Compress button at the top of the window to shrink the file size of your PDF(s).

Open the folder you saved the compressed document to check its new size. You should get quite a reduction in megabytes. For example, I compressed a PDF from 1.7 MB to 338 KB, which is less than a third of the original file size.


You can also compress a PDF without any extra software. There are a few websites you can compress PDFs from. For this tutorial, we’ll be using Smallpdf.

Click here to open the Smallpdf page below.

pdf compress3

Click Choose file to select a PDF document to compress. After you upload your document, wait for the file to compress, then save the compressed file to Windows by clicking Download File Now. The website page will tell you what the new file size is as below.

pdf compress4

That’s all there is to it. Smallpdf, and other online tools, make it incredibly easy to compress PDFs without having to leave your web browser.


Another great website for easily compressing PDFs in Windows 10 is iLovePDF. Not only does iLovePDF allows you to quickly compress PDFs, but it also allows users to do a number of other PDF-related tasks, including merging and splitting PDFs, converting PDFs to Word documents, adding watermarks, and more.

iLovePDF Home Page

To start, click Compress PDF. This will take you to the following page:

Compress PDF

Once you’re on this page, click the Select PDF file button in the middle of the screen and upload the PDF file that you need to compress.

You can choose three different compression options: Extreme Compression, Recommended Compression, or Less Compression.

Extreme Compression will compress the file as much as possible but may sacrifice quality. Less Compression will preserve the quality but won’t compress the file as much. In most cases, Recommended Compression is the best option.

After you upload your file and choose a compression option, click Compress PDF. ILovePDF will compress your document and tell you the new size of your PDF.

Once compression is finished, click Download compressed PDF to download your new document.

Final Thoughts

Whether you need to submit your resume for a job application or share a presentation with a colleague, PDFs are one of the easiest and most accessible file types in existence. However, it’s important to know how to compress them in order to save storage space and make sending them easier.

With 4dots Free PDF Compressor software, Smallpdf, and iLovePDF, you can quickly and easily compress any PDF file in Windows 10. Each of these tools can considerably reduce PDF document sizes, which is a fantastic way to free up some storage space on your laptop and make sending documents via email simpler and quicker.

Did you enjoy this TechJunkie article?

If you did, make sure to check out some of our other great pieces, including How To Speed Up Windows 10 – The Ultimate Guide and Having Slow Internet on Windows 10? Here’s What to Do.

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