Open the PDF file in Adobe Acrobat. 2. Now select PDF — Download from the Homepage to download the PDF file. 3. Then select Reduce PDF Size, and then click Get to download the file compressed in the format chosen in step 2. 4. Select the option to Download in Web. Reduce/Compress PDF in Windows using Windows Explorer or Windows File Explorer How to Reduce/Compress PDF in Windows Using Windows File Explorer Dec 13, 2023 – 1. Download PDF Compressor — Download Link and install using the installation program. 2. For file-extension, use the following link, and for .pdf files use the following link. 3. Then drag 'n drop the file you want to compress online into Adobe Acrobat while clicking on View — Compress, or use the ″Open File‹ and Save As‹ menu. 4. After you finish compressing the file, use the File ‹Open‹ menu to share the file.