filter mode
Filter mode: apply output options only
Details
If no operation is given and one input PDF file is specified, then filter mode is activated. The input PDF file is processed minimally and saved with the given output options. This is likely to be less destructive than using cat.
Examples
Do nothing
pdftl in.pdf output out.pdf
Do nothing
pdftl in.pdf filter output out.pdf
uncompress the input file, making minimal changes
pdftl in.pdf output out.pdf uncompress
Source: pdftl.operations.filter
Read online: https://pdftl.readthedocs.io/en/latest/general/filter_mode.html
Type: HelpTopic