Free Software To Bulk Compress PDF Files To Reduce Size of PDF

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4dots Free PDF Compress is a free software to bulk compress PDF files to reduce their size. It helps to reduce image quality of PDF files, which makes compression process quite easy. Based on image quality level (0-100), selected by you, PDF files will be compressed. While testing this software, I compressed a 71 MB size PDF file upto 4.03 MB in size (image quality level was 11 percent)!.

Compression process depends on two factors: total number of images in your PDF file, and image quality selected by you. More the images and smaller the image quality, better would be the compression.

Note: The compressed files stay in PDF format. I am not talking about compressing PDF files to zip / other formats. And that is the best part of this software.

4dots Free PDF Compress- compress pdf files

This software basically reduces the quality of the images that are included your PDF file. So, it takes the PDF, reduces the quality of images, and adds them back to the PDF to create compressed PDF. It not only compresses images, it does other things as well to compress PDF (I also tried it with a PDF that had only text, and it reduced its size by around 40%).

Even though it reduces images quality, you won’t see lot of different between original and compressed files. That’s why it is one of the best software that falls in this category.

quality of original and output pdf image page

You may also try these 5 free similar tools to compress PDF files.

How To Compress PDF Files In Bulk With This PDF File Size Reducer Freeware?

Working with this free PDF file size reducer is an easy task. To use this software, you can download and install it on your PC. Grab the download link I have placed at the end of this review. Installation process is ad-supported, so you should be careful. If you want to skip third-party tools, use Decline button.

skip third-party tools

Complete the installation process and run this software to open its interface.

Interface of this software supports drag n drop feature, using which, you can directly add PDF files from to its interface. Or else, you can use Add file(s) or Add folder button to add PDF files. Another very useful feature is that you can even compress PDF files that are password protected. It will let you enter password on required field, or will ask for password during compression process.

add PDF files

Once all needed PDF files are added by you, you can select destination folder for output PDFs, and can manage image quality for output files. Use the slider to select quality level or enter it manually.

set output image quality and destination folder

After this, you can tap on Compress button to start the compression process. The time taken by compression process will depend on number of files, number of pages, and number of images in them. Once compression process is completed, you can open destination folder to use output PDFs.

Other Features Present In This Freeware:

  • It integrates with Windows Explorer, so you can directly send a PDF file to its interface using right-click context menu. However, this feature didn’t work, and it made my Windows Explorer crash whenever I tried using this feature. Try and see if it works for you.
  • Available in multiple languages.

Conclusion:

4dots Free PDF Compress is actually quite a useful software, especially if you have lot of large PDF files on your PC, or want to email some large PDF files. I was quite surprised by the amount of compression I was able to achieve with this software.

The fact that it can work with password protected PDF files as well is nice advantage. Definitely a great software to have on your PC.

Get 4dots Free PDF Compress.

Other free products of 4dots software covered by us: 4dots Free PDF Password Remover, Free PDF Image Extractor 4dots, and Free PDF To Text Converter 4dots.

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Works With: Windows
Free/Paid: Free