The Multivalent PDF tool is still my go-to. It hasn't been updated in ages, but the jar still works fine: http://multivalent.sourceforge.net/download.html http

The Multivalent PDF tool is still my go-to. It hasn't been updated in ages, but the jar still works fine: http://multivalent.sourceforge.net/download.html http://multivalent.sourceforge.net/download.html If you run java tool.pdf.Compress file.pdf it will generate file-o.pdf and often trim quite a bit of weight. That's probably what I would suggest sci-hub use too because it's easy to use and automatic. EDIT: this looks quite promising too: https://github.com/pts/pdfsizeopt https://github.com/pts/pdfsizeopt But it has bugs with handling some images... converts them to black boxes. I'd only use this one if you manually verify the result first (so not a fully scripted process). (Or this could be due to me not installing all the bleeding edge dependencies from source as instructed.)