What is PDF24? 1 **Introduction** Hello, in this article, we will explore the advantages and limitations of the PDF24 tool, as well as present a more efficient alternative for compressing PDF files. In summary, while PDF24 is a useful tool for certain PDF-related tasks, it is not the best choice for file compression. ShrinkPDF.com proves to be a much better option for reducing the size of your PDFs before sharing or storing them online. 2 **What is PDF24?** PDF24 is an online tool that offers a range of features for manipulating PDF files, including conversion, merging, and compression. 3 **PDF24 Features** PDF24 offers a variety of tools for PDF users, but one of its main strengths is its ease of use. However, when it comes to PDF compression, the results are not always up to expectations.