NXPowerLite Desktop 9.1.2 | macOS | 61 mb

NXPowerLite will compress PDF, JPEG, Microsoft PowerPoint and Word files simply and effectively, making them easy to email as attachments. It is especially effective on files that don't zip well. Optimized files stay in the same format - a PDF remains a PDF. It will look and feel identical to the original, just much smaller. You can optimize and automatically attach files to a new email by selecting the files and using 'Optimize and email' in Finder.