Hobbies and Crafts How do I compress a PDF without Adobe? How can I compress a PDF file for free? Click the Select a file button above or drag and drop files into the drop zone. Select the PDF file you want to make smaller. After uploading, Acrobat will automatically reduce the PDF size. Sign in to download or share your compressed PDF. Related Posts:Is there a PDF editor in Chrome?How much does PDF Reader Pro cost?How do I combine multiple screenshots on a Mac?How do you change a PDF file name?