Edit PDF
1.1 Compress PDF
1.2 Split PDF
1.3 Reduce PDF Size
1.4 Crop PDF
1.5 Password Protect PDF

How to Compress PDF Files and Reduce PDF to a Smaller Size

Have worked with PDF files, you would know how they can become large very quickly if they contain graphics and images. It can be so embarrassing to take a long time opening a large PDF on a meeting every time, and what's even worse, you cannot send a large PDF file to other people via email. In order to solve this problem, you can compress PDF file and reduce PDF to a smaller size.

So how to compress a PDF? In this post, I will show you a couple of methods to reduce the size of a PDF file. In general, you can choose an online PDF compressor to compress PDF file within simple clicks, or you can free compress PDF with a PDF compressing program on Windows/Mac. What's more, you can also shrink PDF file size with Adobe Acrobat if you have one.

Compress PDF

Compress PDF

Part 1. Compress PDF with free online PDF compressor

The simplest way to shrink your PDF file is to use a free online PDF compressor. Here I recommend two reliable free online PDF reducers for you.



Smallpdf.com provides free service to compress PDF file. All you need to do is to drag and drop PDF file in the box, wait for the PDF compression to complete and download your file. (It may take seconds to wait for a compressed PDF file.) This online PDF compressor tool will reduce your scanned PDF files to 144dpi which is perfect for uploading files to the web and through email.

Smallpdf.com is browser-based and works for all platforms. It does not require any download or registration.

Neevia Online PDFCompress

Neevia PDFCompress

Neevia Online PDFCompress is another free online compressor tool. The PDF compression process is also simple: Upload your PDF file, click "upload & compress" button and then you can download the compressed file.

What's more, Neevia Online PDFCompress also provides flexible options for compression. For example, you can change the degree of PDF compression or remove bookmarks or PDF layers if you want.

Part 2. Free desktop-based PDF compressor

For people who are in need of compressing batch PDF files, online PDF compressor may not be a good choice as you have to load PDF file one by one, plus, the PDF compression online works quite slow. In order to shrink PDF size more efficiently, you could consider a desktop-based PDF compressor.

PDF Compressor

PDF Compressor is a free program you can download for Windows 8/7/Vista/XP, it allows you to compress PDF files, reduce PDF file size easily and quickly. It offers an easy-to-use UI. With this handy tool, you can shrink PDF files, reduce the size of PDF files noticeably without any quality loss. The application can process thousands of PDF files at one time. The user interface is intuitive and easy to use, no learning curve, no skill needed.

Part 3. OS X PDF Filter: Compress PDF on Mac

If you have a Mac, there is a great and easy way to reduce the size of a PDF file using the built in Preview app.

1. Firstly, open your PDF file in Preview by just double-clicking on it in Finder. By default, PDF files will open in Preview unless you installed Adobe Reader or a third-party PDF viewer. In that case, just right-click and choose Open With.

2. Click "File" > "Export", a dialog box will disappear.

Export PDF

3. Click the Quartz Filter option and select "Reduce File Size".

Reduce PDF File Size

4. Click "Save". If you do not rename this file, a dialog box will appear asking if you wish to replace the original document. This will overwrite the current document.

Part 4. Compress PDF with Adobe Acrobat

If you have Adobe products on your computer, you can also choose to shrink a PDF file with Adobe Acrobat.

Compress PDF with Adobe Acrobat

1. Go to "File" > "Open" and open the PDF file you intend to compress with Adobe.

2. Go to "File" > "Save As" > "Reduced Size PDF" In the pop-up box, select Acrobat 10.0 or later in the drop-down menu of "Make Compatible With" and click "Ok". And then find a place in the prompt to save the PDF file.

Simple, right? Since version 7 of Adobe Acrobat, there is a new option in the "Advanced" menu called "PDF Optimizer", which gives you more options to compress PDF. But the process can be very complicated and unnecessary for simple PDF compression, so we won't talk about it here. You can try by yourself if you are interested.

In this article, we have provided four methods to compress a PDF file. You can try to free compress PDF online, or use desktop-based PDF compressor. For Mac users, the built-in PDF Filter option could help you reduce PDF size easily. Also, you can try to compress PDF with Adobe Acrobat if you have one.

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May 15, 2018 10:30 / Updated by to PDF