How does the pdf compression service work?

D

Dmitry Lebedev2015-04-15 08:58:47

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Dmitry Lebedev, 2015-04-15 08:58:47

Hello.
Tell me how PDF compression services work, such as pdf-docs.ru or smallpdf.com/compress-pdf As
I understand it, the script parses PDF into jpeg files, compresses these jpegs with already set compression and assembles PDF back?
Or I'm wrong. I would appreciate a script.

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Vladimir Martyanov, 2015-04-15
@vilgeforce

Send them a PDF and see what will happen in the end and how the files will differ.