PDF is powerful but weird. For instance, for files with compressed fonts (=most files, such as created by OpenOffice), I found really no tool to bring the strea

PDF is powerful but weird. For instance, for files with compressed fonts (=most files, such as created by OpenOffice), I found really no tool to bring the streams into some human readable form. I.e. write a "hello world" file in OpenOffice, export to PDF, and try to get an successful grep hello file.pdf I don't even grep for "hello world". I never got success here, despite any uncompression etc provided by tools like mutool or qpdf. I also tried grepping for Base64-encoded variants of these strings. No success. PS: Motivation is sed -i s/Hello/Bye/I file.pdf