Change PDF page size without re-scaling a content (CLI)

## Question I have a PDF with a non-standard page size. I would like to change PDF canvas size to A4 without re-scaling the content. I can receive the expected result with Printing to PDF (picture below, original content is a black rectangle). However, I would like to achieve the same result using Linux CLI. How can I change PDF page size **without** rescaling the content, using the Linux command line? ## Investigation I have tried to use pdfjam: pdfjam --outfile out.pdf --paper a4paper in.pdf. Unfortunately, it scales to fit in.pdf and thats unacceptable for me. Also I tried cpdf: cpdf -scale-page a4portrait in.pdf -o out.pdf scales content to the page size. Moreover, found PdfScale . However it can only scale content or change page size with fitting the content. The similar problem has been described here , but the author used GUI application (not CLI)