What type of request is this?

New tool idea

Clear and concise description of the feature you are proposing

Sometimes when uploading a PDF document to Company or Email-Service, the size of accepted files is limited (i.e. 5MB or 20MB).
Compressing the PDF file is needed before.

Is their example of this tool in the wild?

Under Linux, I use Ghostview to compress such files:
gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/prepress -dNOPAUSE -dQUIET -dBATCH -sOutputFile=document_compressed.pdf document.pdf

Not tested: It shall be possible with Qpdf too:
qpdf --compress-streams=y --object-streams=generate document.pdf document_compressed.pdf

Additional context

No response

Validations

• Check the feature is not already implemented in the project.
• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.
• Check that the feature can be implemented in a client side only app (IT-Tools is client side only, no server).