I have used qpdf with
qpdf --qdf --object-streams=disable orig.pdf expanded.pdf
As reference from https://unix.stackexchange.com/a/109177/306249
I can see all objects in text editor. But I cannot view the text in the pdf.
I have test with "Hello world" text in pdf. But I can't see this text after decompress.
How to view the text with objects?