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Reduce your PDF file size smaller with PDF Compressor with ease!

Cisdem PDF Compressor is an initial PDF squeezer to help you compress, reduce and optimize large PDF file size in batch. It provides easy and effective ways to compress big image-heavy PDF files using extensive set of options and presets. It let you preview optimized PDF document and original side-by-side in real time, and maintains the original PDF quality and formats.

Cisdem PDF Compressor has four preset filter compressing modes let you quickly make PDF documents smaller, and allows customize your settings on the resolution and image quality for compressing different PDF documents. This will help you keep the important contents, also greatly save hard drive’s storage space, speed up network transmission and more efficient on business work.

3 Steps to Compress PDF Size
• Cisdem PDF Compressor only has 3 simple steps let you to compress PDF size easily: Import PDF documents – Choose compression mode – Start compress PDF documents.

Four Preset Compression Modes Available to Squeeze PDF File Size Quickly
• Minimal File Size, Small File Size, Medium File Size, Large File Size to meet your different ordinary compression needs.

You Can Customized DPI (Dots Per Inch)
• Cisdem PDF Compressor allows you set the specific preferred compression result and content quality if necessary.

Real-time Compression Size
• Show the sizes of your PDF files and the predicted sizes in different compression modes after compression.

Compress PDF Files Size in Batch Supported
• Compress hundreds of PDF documents or a 500-page PDF file within mins.

Preserve Highest Quality after Compressing
• Optionally remove useless elements unnecessary to reduce large PDFs to their smallest size - without compromising quality.

User-friendly and No Extra App Need
• Support compressing all versions of PDF documents without Adobe Acrobat Reader installed.

Feel free to contact us directly if you need any kind of support:

Ratings and Reviews

4.4 out of 5

8 Ratings

8 Ratings

Best App by far for Keynote PDF's


I have tried a lot of apps for making Apple Keynotes smaller, I use a lot of graphics and exporting as low quality on Keynote makes things blurry or makes png's transparency black. Adobe DC and online tools have not solved my quality issues, and 200MB is just too big for most people even if I host the documents in the cloud. This app solves everything perfect quality! I got the app on the Apple App store so I can use it on my iMac Pro, MacBook, Pro and Mac Pro because the developer's website version is only one licence which in 2018 is basically useless. Just wish it had retina support.

Easy to use, compresses without blurring


Scanned a 2700 page reference text as 24-bit document into PDF Expert that was 2.7GB and could not be opened or manipulated due to size. Used Cisdem to compress down to two different sizes: 1.2 and 1.7 GB. Document opened quickly after compression, text and illustrations were clear, and could perform all editing functions. Have tried a couple other apps but this is pretty much equivalent to what can be done on Adobe in a windows environment.

Developer Response

Dear customer, glad to hear that Cisdem PDF Compressor works fine for you! We will keep updating the software and make better apps for you!

Fine so far

Yola G.K

I am thrilled for finding this app, as I always have many PDF files to send or share with my clients, it simplify blew my mind with the easy compression mode, and I can see the small pdf files in real time, works really well. And you also own your data, export the compressed pdf as a copy you need.


1.5 MB
Age Rating
Rated 4+
Copyright © 2017 Cisdem Inc. All rights reserved.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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