How can you compress a PDF file without losing quality? This article introduces 4 different solutions to shrink PDF files online.

Orpalis PDF Reducer

Orpalis PDF Reducer offers one of the fastest compression rates on the market to reduce PDF size. This PDF shrinker also offers several compression options, including the option to customize output formats, image and color recognition, and remove content. Orpalis PDF Reducer also allows you to take full advantage of your computer’s power when compressing PDF files, as you can choose between multi-threading and single-threading for faster compression. With Orpalis PDF Reducer you can achieve compression rates of up to 80%.


This is one of the oldest PDF compressors that can be found on the internet. PDF-Online is very popular because of its simple interface and functionality. It also offers a handful of advanced compression settings that have the ability to customize images, fonts, and the general structure of the PDF file. Most of these functions are usually only found in high-end PDF compressors, which is why this software is favored by many users.

On the other hand, the free online version of PDF-Online will watermark all converted PDF files. Users have to make a purchase to access the full range of features.


AnyPDF is another pdf compression tool that takes the simplicity of PDF-Online and combines it with the versatility and efficiency of Orpalis. This online tool allows you to upload documents from your computer, dropbox or Google Drive or drag them to the interface. The compression is quite fast, despite the lack of advanced features.


PDFzipper offers one of the fastest compression rates of any online PDF compressor. In addition to a simple user interface, PDFzipper is easy to use and works with all common browser interfaces. However, it does not contain any additional features and most users looking for more advanced features will likely be disappointed.