How to Reduce PDF File Size on Your Devices

How to Reduce PDF File Size on Your Devices

Last updated on June 12, 2018 by

PDF is considered as the most secured and commonly used format to send documents or compiled pictures. However, some systems or emails may have requirements to the size of uploading files, so people want to reduce the size of PDF. Furthermore, it is a great idea to keep smaller files to free up some memory on our storage, yet maintain the authenticity of the document without compromising the confidentiality. Here are five PDF editors which can help you reduce PDF file size no matter what device you are using.

Free Ways to Reduce the Size of a PDF File

Windows Solution

1. LightPDF

LightPDF is a free online PDF tool which contains multiple useful features such as PDF converting, PDF editing, PDF compression, ect. This tool is based on web, thus, once you have a browser and internet, you can enjoy its functions. The website works fast and safely. And the files modified through this website will maintain the high quality. Now let’s use this awesome tool to reduce PDF file size.

Step 1: Go to the page for compression.

Step 2: Drag and drop the PDF file to upload it. The website will automatically compress the file.

Compress PDF

Step 3: After that, click the downward button to get the compressed file to your PC.


The tool is 100% free to use, there is no limitation to the file size or the times of uploading.

2. SmallPDF

SmallPDF is an application that you can use to reduce, convert, split, merge and edit PDF files online as well as with desktop program. This app is easy to use and at the same time, you can make sure that your files remain confidential since they are deleted after an hour to protect their customer’s information. Here is how to use this website to reduce a PDF file size online.

Step 1: Go to Smallpdf’s page for compressing PDF.

Step 2: Click to choose a PDF file or drag and drop the file to the “Red Box” where it says “Drop PDF here”.

SmallPDF Online

Step 3: Wait until your file is compressed. Once done, click “Download File Now” on the bottom left side of the box. Also, you can save the file to your Dropbox or Google Drive.


  1. For the desktop application, just download the app then choose “Compress” then you are good to go.
  2. To fully enjoy the function of this app, you must register and get a premium subscription.

Mac Built-in Solution

For Mac users, Apple has a simpler solution for you to reduce PDF file size for free – use the Mac built-in feature. Follow the steps below to learn how.

Step 1: Open the PDF file, choose “File” then look for “Export”.

Click Export

Step 2: Click “Quartz-Filter”, then choose “Reduce File Size” from the drop down menu.

Step 3: Lastly, click “Save” to save the PDF file.

Reduce File Size


When the file is compressed, the PDF may have a lower quality than the original.

PDF Tool Ultimate

PDF Tool Ultimate is an application that you can download on your Android device. You can compress, merge, flatten, rotate, and lock your PDF file, etc. Just like Smallpdf, files will be deleted after an hour on their server. All process is done on their system. Now let’s use this app to reduce the size of a PDF file.

Step 1: Download the app from Google Play Store and launch it.

Step 2: Choose “COMPRESS”, tap “+” button at the bottom right.

PDF Tool Ultimate

Step 3: Select a PDF file and wait for it to load. Once completed, it will be automatically saved to your Android phone.


To check where your file is stored, you can tap the information icon beside the file to learn more.


iLovePDF is a free tool that can merge, split, compress, convert and edit PDF files. This app can work on devices running iOS 9.0 or later. Below is how you can reduce a PDF file size using this tool.

Step 1: Get the app on your iDevice, open the app and tap “COMPRESS PDF”.

Step 2: Select a PDF file from your mobile device, Google Drive or Dropbox.

Step 3: Hit “Next” to start compressing. It will be saved on your drive after compressing.

iLovePDF Compress


All these apps will help you easily reduce the size of a PDF file. By doing this, you can decrease the memory consumption and make it easier to send the file via email since it has been compressed.

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Posted by: on January 29, 2018 to Tips and Resources, Follow me on Twitter. Last updated on June 12, 2018

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