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How to Compress PDFs

Utilizing portable document format can give users many potential benefits.

For example, it allows users to easily preserve the original formatting of their files and make sure that the text and any other additional elements - such as tables, pictures or graphics - remain in their initial positions and stay an integral part of the document.

This type of format also sets itself apart from a security point of view. Files can be easily shared without major concerns over security - since the user can easily lock it with the help of a custom password.

Due to their formatting and quality standards, PDF documents are often pretty “heavy” and take up a lot of space on your hard drive or in the storage of your mobile device. Of course, there is always cloud storage. But extra space usually costs money - money which doesn't need to be spent if you can find the right kind of platform.

So the best way to keep your important information and free up some space is to compress PDF files.

File extension .pdf
Internet media type application/pdf
Description: PDF is a document format, that is widely used all over the world for almost 30 years. Developed by Adobe Systems as a multi-platform file format, it has become interactive and now may be not only viewed, but edited and enhanced with visual content. You can make PDF document a fillable form as well.
Technical Details: PDF format has its own technical formats for printing: PDF / X-1a, PDF / X-3. PDF documents include an electronic signature mechanism for protecting and authenticating documents. A large number of related documentation is distributed in this format. In PDF documents text is stored as content streams. It is not encoded in plain text.

Developed by ISO
Initial Release: 15 June 1993
Useful links:

How to Make a PDF File Smaller

In order to reduce the size of your document, try our online converter called AltoCompress.

This the best way for you to utilize the space on your device or in your cloud storage:

  • Import documents to the optimizer tool right from your Mac or desktop computer - as well as from any mobile device.
  • Resize them using the appropriate functions.
  • Get the compressed file without losing quality associated with your PDF.


After performing a few easy steps, you’ll have more free kilobytes and also know how to compress PDF files online from any device - without installing any software.


The How to Guide

How to Reduce the Size of the File and Preserve the Quality

  1. Get to by typing it in your search bar or the web address bar in your browser.
  2. Use one of the following ways to import the necessary document to the converter: drag and drop it, upload it from your gadget or upload it from one of the pre-approved cloud solutions.
  3. In case you uploaded the wrong file, click on the bucket icon to delete it.
  4. Hit the Compress Now! button.
  5. Wait a few seconds for the file to be resized.
  6. Save the compressed file using the Download Now button.
  7. Repeat the compression using the Start over again function.
  8. In order to go to PDFfiller’s editor and redact and share your document, click Work on your PDF.


How to Resize a PDF

Using our AltoCompress online solution, you’ll be able to do the following:

  • Quickly compress an oversized PDF document.
  • Get multiple compressions by using the tool as many times as you like.
  • Avoid tedious registration and confirmation procedures.
  • Work with an intuitive solution that requires no complex guidelines.
  • Perform all of these needed actions while on-the-go.


Try it now and see for yourself how it works! Learn more about Alto solutions to improve your document management today.