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Home / Blog / Compress PDF to 300 KB or Less in Seconds [Windows/Mac/Mobile]

Compress PDF to 300 KB or Less in Seconds [Windows/Mac/Mobile]

By Lydia | Follow twitter | Updated on November 9, 2023
PDF enjoys wide popularity for its compatibility and portability. However, a PDF file size can be large due to the embedded fonts, text, and images. If you deal with lots of PDFs, there are chances that you might be struggling for disk space. Then, it’s time to compress PDFs to 300 KB to free up more space.

This post features a comprehensive walkaround on how to compress a PDF to 300 KB on Windows, Mac, and mobile devices. Both paid and free applications are introduced with detailed steps to help you start

Compress PDF to 300 KB on Windows

SwifDoo PDF is an all-in-one PDF toolkit running on Windows with PDF compression as one of its core features. The desktop application enables you to apply hyper compression to a PDF and largely reduces the PDF file size. The PDF compressor to 300 KB can compress up to 90% of a PDF and even lets you customize the compression level you like. The batch compression feature is able to resize multiple PDFs at once.

Install and get the PDF compressing tool ready by clicking the button below. Now follow the instructions to reduce your PDF to 300 KB in SwifDoo PDF:

Step 1: Launch the application on your PC or laptop and tap Compress PDF;
Compress PDF to 300 KB on Windows

Step 2: Drag and drop the target file to its workspace;

Step 3: Under the Compression Level tab, select High and click on the Start button to compress the PDF to 300 KB or less.
Compress PDF to 300 KB on Windows 1

Note: If the PDF contains lots of images, the image quality might be undermined after high compression. To reduce PDF size without losing quality, the medium compression level is recommended.

Reduce PDF Size to 300 KB in Bulk: For users who need to get multiple PDFs resized to 300 KB, SwifDoo PDF offers the optimal feature to get the job done and there is no limit to the number of imported PDFs:

Step 1: Enable the compress feature as described above;

Step 2: Press Add Files to add your PDF documents;

Step 3: To batch compress PDFs to 300 KB, choose High at the bottom of the window (Next to Batch Compress).
Compress PDF to 300 KB on Windows 2

Tips: If you want to select different compression levels for each file, click on the drop-down arrow next to the file name to set the option.

Compress PDF to 300 KB on Mac

Preview is the built-in PDF compressor to 300 KB developed by Apple. This free PDF program allows you to resize a PDF file to its extreme level by default. As there is no compression level to choose from, this PDF tool is the right choice for users who need to hyper compress a PDF. To configure the compression ratio, an online PDF site might be helpful.

Take a look at how to compress PDFs to 300 KB for free on Mac:

Step 1: Right-click on the PDF and select Open with. Choose Preview to open the PDF;

Step 2: Navigate to File and tap Export;

Step 3: Set the format as PDF and hit Reduce file size. Finally, tap Save to reduce the PDF size to 300 KB.
Compress PDF to 300 KB on Mac

Compress PDF to 300 KB Online

iLovePDF is one of the most reliable web-based PDF compressors. The iLovePDF Compress feature enables you to compress PDFs to 300 KB online for free. Free users can process limited files per day and are allowed to reduce the file size of 2 PDFs in a batch. Three compression levels are available, including less compression, recommended compression, and extreme compression.

Follow the guide on how to resize PDF files to 300 KB online in iLovePDF:

Step 1: At the official webpage, press Compress PDF;

Step 2: Click Selelct PDF files to upload your PDF;

Step 3: Locate EXTREME COMPRESSION and go to Compress PDF to finish the task.
Compress PDF to 300 KB online

Compress PDF to 300 KB on iOS/Android

Xodo is a handy PDF app compatible with both iOS and Android to reduce PDF file size to 300 KB. The intuitive interface makes it easier to complete the task without a learning curve. You can resize the PDF in a few clicks on a mobile phone hassle-free without losing its quality.

Let’s see the steps to compress PDFs to 300 KB for free on iOS or Android devices:

Step 1: Open the app and tap the desired PDF;

Step 2: Click on the three-dot icon in the top right and select Save a copy;

Step 3: Press Reduced file size copy, hit Smaller file size, and click on the OK button to compress the PDF to or less than 300 KB.
Compress PDF to 300 KB on iOS/Android


Whether you use Windows, Mac, or a mobile phone, an optimal tool can be utilized to compress PDFs to 300 KB after reading this post. There is no need to struggle for storage space anymore and the file quality can be preserved after the compression.

For Windows users who opt for desktop PDF compressors to 300 KB, SwfiDoo PDF is the go-to for reducing PDF size for one or multiple documents at a time to improve your efficiency.


Q:How do I make a picture 300 KB?

You can utilize SwifDoo PDF’s image compressor to reduce the file size of a picture or image to 300 KB. Multiple images can be compressed in a batch to remove the hassle of repeatedly performing the same task for each picture:

Step 1: Open the software, navigate to Convert, and click Image Converter;

Step 2: Select Compress Image and add your picture to the indicated area;

Step 3: Tap Start to compress the picture to 300 KB.

Q:How do I compress a Word document to 300KB?

SwifDoo PDF offers an MS Office file compressor to compress Word, Excel, and PowerPoint documents. A total of 9 compression levels can be selected to make large Word files smaller. Check out how to compress a Word document to 300 KB with the software:

Step 1: Run the application and choose Batch Process;

Step 2: Select Other Features and click Compress Word:

Step 3: Upload your Word file to the workspace. Set the compression level to 9 and tap Start to complete the task.

Lydia is an English columnist for AWZware. She is familiar with different technology products such as office software, location changers, and video software applications. Focused on tech blog writing, she is willing to solve your problems with up-to-date information.

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