pdfsizeopt

> ...tools like pdftk have been able to losslessly compress them... I have had good luck with pdfsizeopt. https://github.com/pts/pdfsizeopt

The big restriction is that the classic Postscript typefaces are not available (no Times, Helvetica, or Zapf Dingbats), and the PDF file must bundle any fonts it uses. The pdfsizeopt package will make any PDF smaller, and I think it deletes letters/characters from the included font that are not used. https://github.com/pts/pdfsizeopt

This is missing the "pdfsizeopt" suite, that bundles statically compiled utilities to reduce size. Static compilation means that it will run on most Linux platforms without extra required software. I believe one aspect of it will remove characters from included fonts that are not used. It really is quite impressive. https://github.com/pts/pdfsizeopt

There is a general PDF shrinker, known as "pdfsizeopt" that is bundled with static builds of gs and a number of other utilities. It cuts some of our PDFs to 10x smaller, mostly by removing unused fonts (but doubtless also some other magic). The developer asks for donations for production use from those who can afford it. https://github.com/pts/pdfsizeopt Send donations to the author of pdfsizeopt: https://flattr.com/submit/auto?user_id=pts&url=https://githu...

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 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 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.)