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File extension.pdf
Internet media typeapplication/pdf
Description:PDF was launched by Adobe Systems as a Portable Document Format. It provides an integrated platform for sharing document files while eliminating differences in internal application or operating system preferences. Users can open PDF files on any device and there are a number of applications to do that. Additionally, PDF files can include texts, visuals, links, and many other things.
Technical Details:PDF converts all the data into a graphical format so it cannot be edited directly. Its technical design is very similar to the design of PostScript. PDF file incorporates a Cartesian coordinate system that describes the design of a page. This makes PDF files usable regardless of which device or operating system a user is using.
Developed byISO
Initial Release:15 June 1993
Useful links:



How to Compress PDF Files Online?

In order to decrease the size of PDF files, follow the steps mentioned below:

  1. Open any web browser and visit CocoCompressPDF.com.
  2. Drag and drop the PDF file, or click on ‘Choose File’ and upload the PDF file manually.
  3. Alternatively, you can also upload the PDF file from cloud storage such as Google Drive, Dropbox, or OneDrive.
  4. Once the upload is completed, click on the ‘Compress Now’ option.
  5. In order to stop the compression midway, click on the Trash icon.
  6. When compression is complete, click on the ‘Download’ button to save the PDF.
  7. You can also edit the file further by clicking on the ‘Work on your PDF’ button.

How We Rank Against Our Alternatives

There are many other PDF compression services available online. However, CocoCompressPDF ranks at the top due to many unique features. Here is the comparison of various features of CocoCompressPDF with other PDF compression alternatives.

CocoPdf Smallpdf Adobe
View & Edit
Word to PDF
Word to PDF-
Word to PDF-
Word to PDF
View & Edit
Word to PDF-
Word to PDF
Word to PDF-
Word to PDF-
Word to PDF
Split PDF
Merge PDF
Combine & Reorder--
Extract Pages--
Compress PDF-
Rotate PDF-
Convert from PDF
PDF to Word
PDF to Excel
PDF to PNG--
Convert to PDF
Word to PDF
Excel to PDF
PNG to PDF--
Web to PDF--
Mac PDF converter
Pages to Doc--
Doc to Pages--
Numbers to XLS--
XLS to Numbers--
Sign & secure
eSign PDF
Protect PDF-
Password PDF--
Unlock PDF-
Share PDF-
iOS and Android Apps
Chrome Web Store - Extensions-
No software downloads-
Cloud storageUnlimitedNo infoNo info
PriceFreeFree 7-Day Trial paidFree 7-Day Trial paid
Encryption and security
Support24/7/365No info
No ads

“ There is often a limit on PDF sizes when we submit it online for official purposes. I tried several methods to compress PDF files, but the process for it was too long. Then I tried CocoCompressPDF and it is the easiest solution I have seen so far.”


“ This app makes compressing PDF files a piece of cake. I use it quite frequently for processing files. It compresses PDF files within seconds without asking for signup or pricing. ”


“ I love CocoCompressPDF as I can use it from any device anywhere and compress a PDF file within seconds. Nothing is better than this app when it comes to compressing PDF files, as I have tried various alternatives before it. ”


How to Reduce PDF File Size?

CocoCompressPDF makes sure that you can compress any PDF files easily without any registration for the service. There are no ads or pricing plans, just a simple interface that compresses within seconds.

Using Google Chrome
With Preview on Mac
With Adobe Acrobat Reader
How to Reduce PDF File Size Online?

CocoCompressPDF is in service to offer you an easy solution for reducing the size of PDF files. It works through a clean and simple interface where you can compress the PDF files right from the homepage. There is no need to register for the service, no requirement for buying any subscription, and you don’t have to provide your email address.

Using the website also makes sure that you do not have to install any application on your phone or computer. You can compress as many PDF files as you want, directly from the interface without any restrictions. Here is how to compress PDF files online:

  • 01Visit CocoCompressPDF.com on any web browser.
  • 02Drag and drop the PDF file on the drop space, or choose the file manually through the ‘Choose File’ button.
  • 03When the upload is finished, click on the ‘Compress’ button.
  • 04Compressing the PDF will take a few seconds. After compression, save the file to your computer.
  • 05You can also save the PDF file directly to online cloud storage.
  • PDF to Word
  • PDF to Excel
  • PDF to PPT
  • PDF to JPG
  • PDF to PNG
How to Reduce PDF File Size Using Google Chrome?

Google Chrome is undisputedly the best web browser out there. The browser itself has a lot of features, which are additionally supported by the huge library of add-ons and extensions. Therefore, even if there is something that Chrome cannot do by default, you can still make it work by adding an extension in the Chrome Store. This eliminates the need to install various apps on your computer or phone.

Even PDF file compression can be done through these extensions. CocoPDF is available in Google Chrome extensions and it can compress any PDF file directly from the Chrome browser. In order to compress your PDF file online through Chrome, just follow the steps below:

  • 01Find CocoPDF on Google Chrome’s extension page and install it to your system.
  • 02Open CocoPDF through its extension icon in the Chrome menu bar.
  • 03Upload the PDF file and click on the ‘Compress’ option.
  • 04Wait for the compression process to finish, then download the reduced PDF file.
  • 05You can also save the file directly to Google Drive, Dropbox, or OneDrive.
  • PDF to Word
  • PDF to Excel
  • PDF to PPT
  • PDF to JPG
  • PDF to PNG
How to Reduce PDF File Size on Windows?

Windows is the most commonly used operating system, which means that it is not uncommon for Windows users to search for a PDF compression application. While the online solution of compressing PDF files through CocoCompressPDF works great, regular users might prefer an app installed on their Windows device for the purpose.

This conversion app can be directly downloaded through the Windows store on any Windows device. There are a lot of options available for PDF size compression, from which users can choose their pick. Downloading the app from Windows Store makes sure that you are using a verified solution, which is trusted by Windows itself. Therefore, it is not going to harm you in any way.

  • 01Open Windows Store and download any PDF compression application.
  • 02Open the PDF file with the compression software.
  • 03Complete the conversion process through the option that applies to the app.
  • 04Download the file to your Windows device from the app.
  • PDF to Word
  • PDF to Excel
  • PDF to PPT
  • PDF to JPG
  • PDF to PNG
How to Reduce PDF File Size on Mac?

Unlike Windows, Mac computers come loaded with a range of utilities that the user can use for viewing PDF files and modifying its contents. Due to these preloaded applications, more and more Mac users prefer using PDF files for work and other purposes. However, this makes it even more important to know how to reduce the size of a PDF file on Mac.

The Preview and Pages apps on a Mac let you open any PDF file and view its content. Even compressing the file size is possible without the need to install any added application. In order to reduce the PDF file size on a Mac computer, just follow the steps below:

  • 01Open the PDF file on a Mac through the File Preview.
  • 02Click on the ‘File’ option, and then go to the ‘Export’ option.
  • 03The Export popup will open. Choose the option that says ‘Quartz Filter’, and click on the ‘Reduce File Size’ option to decrease the size of the PDF file.
  • 04Choose the location to save the new compressed file on your Mac device.
  • PDF to Word
  • PDF to Excel
  • PDF to PPT
  • PDF to JPG
  • PDF to PNG
How to Reduce PDF File Size Using Adobe Acrobat Reader?

Adobe is the company that launched PDF format. It is only obvious that Adobe Acrobat Reader is the most widely used PDF reader out there, available for all platforms. In fact, Adobe Acrobat is so popular that there are several versions of this application. Most of these versions are premium, whereas the Adobe Acrobat Reader DC is completely free.

The benefit of Adobe Acrobat is that it is even available for the mobile platform. Therefore, you get tremendous features regardless of the price and synchronization of files across all devices. Adobe Acrobat Reader also provides the option to reduce the size of PDF files directly from the application. In order to accomplish this, follow the steps below:

  • 01Install Adobe Acrobat on your device if it is not installed already.
  • 02Open the PDF file you want to compress with the Adobe Acrobat Reader.
  • 03Click on the ‘Tools’ option in the menu bar, and select the option ‘Optimize PDF’.
  • 04Click on the ‘Reduce File’ button in the top toolbar.
  • 05If you want detailed customized compression, click on ‘Advanced Optimization’.
  • 06Click on ‘Ok’ to save your changes. Save the file to a location on your device.
  • PDF to Word
  • PDF to Excel
  • PDF to PPT
  • PDF to JPG
  • PDF to PNG
How to Reduce PDF File Size Using a Cell Phone?

Compressing a PDF file is not just possible on your computer. It can also be accomplished through any simple smartphone as well. The best part is that you do not have to download any premium app on your phone in order to compress a PDF file. CocoCompressPDF is available directly through the web browser of mobile phones and is completely mobile friendly.

Therefore, you can use your phone’s web browser to compress a PDF file directly. Compressing a PDF file allows it to take reduced space in your phone’s internal memory. Since cell phones aren’t as large on storage as computers, the compressed PDF files will turn out to be very advantageous. Here are the steps on how to reduce PDF file size using a cell phone:

  • 01Open your phone’s web browser and visit CocoCompressPDF.com.
  • 02Upload the PDF file through the ‘Choose File’ option or through cloud storage.
  • 03Click on the ‘Compress’ option and wait for a few seconds for file compression.
  • 04Download the file to your device or directly to cloud storage.
  • PDF to Word
  • PDF to Excel
  • PDF to PPT
  • PDF to JPG
  • PDF to PNG
How to Reduce PDF File Size on iPhone?

People who buy iPhones understand how precious storage space is. There is no option for expandable storage and going for higher storage options seriously creates a bump in prices. Therefore, iPhone users prefer compressing their files and documents wherever possible to keep the available storage space high.

Not just that, but several official requirements and online forms have a maximum PDF file size restriction. In case you want to upload heavier files, you will need to compress them first. There are various ways to do it on an iPhone. For occasional users, the online file compression by CocoCompressPDF is the best way to go.

For the regular users, there is a dedicated app available on the App Store, called CocoPDF, that can do the job for you. The benefit is that there are no restrictions on how many files you want to compress, without any pricing plans and without registration. Here are the steps to compress a PDF file size on an iPhone:

  • 01Install the CocoPDF app from your iPhone’s App Store.
  • 02Open the PDF file in the app and click on the ‘Compress’ button.
  • 03The compression process will take a few seconds to complete.
  • 04Download the compressed version to your iPhone’s storage or online cloud storage.
  • 05There are various options available above the ‘Download’ button which allow you access to more powerful editing tools.
  • PDF to Word
  • PDF to Excel
  • PDF to PPT
  • PDF to JPG
  • PDF to PNG
How to Reduce PDF File Size on Android?

Android phones support a variety of PDF compression options. On one hand, you have the option of using CocoCompressPDF’s online interface for rare compression occasions, the other hand offers you a dedicated app on your Android device for PDF compression.

The PDF compression Android app goes by the name of CocoPDF and comes with a whole range of features. Other than PDF compression, you can also edit PDFs directly and convert them into other formats. In order to reduce a PDF file size on an Android device, simply follow the steps below:

  • 01Download the CocoPDF app on your Android phone through the Playstore.
  • 02Open the PDF file with the application.
  • 03Click on the ‘Compress’ option and wait for the compression to finish.
  • 04Save the file to your Android device or to online cloud storage.
  • 05If you want to keep editing the PDF file, select the option above ‘Download’.
  • PDF to Word
  • PDF to Excel
  • PDF to PPT
  • PDF to JPG
  • PDF to PNG

PDF Reducer FAQs

How do I reduce the size of a PDF offline?

The best way to reduce the size of a PDF offline is to download the CocoPDF app on your Google Chrome, Android phone, or iPhone. Upload the PDF file, click on the compress, and save it to your device.

How do I reduce PDF to 100kb?

CocoCompressPDF allows for PDF compression with various optimization options. You can choose how much compression you want, and what should be the size of the final PDF file.

How do I reduce the size of a PDF file for free?

For compressing a PDF file completely free, visit CocoCompressPDF.com and upload your PDF file. Click on the Compress option and save the compressed file to your device completely free, without any registration.

How do I compress a zipped file?

CocoCompressPDF is a great way to compress any file online. Simply upload the file at CocoCompressPDF.com, click on ‘Compress’, and download the compressed file to your system.

Can I compress a compressed file?

Yes, it is possible to compress a compressed file at CocoCompressPDF.com. Upload the file and choose the compress options that you want. It will take a few seconds and the file will be compressed for you completely free, without any registration or email.

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