A quick script to add signature images to PDFs, because I couldn't find anything that worked well for the purpose under Linux.

Pros: should work with most PDFs, and with signatures as PNG's or JPG's. It preserves the incoming PDF's text format (e.g. doesn't convert every page to images like some alternatives).

Cons: no gui yet.

Install with pip:

pip install signpdf

Or from git:

git clone https://github.com/yourcelf/signpdf
cd signpdf
virtualenv venv
source venv/bin/activate
pip install -r requirements.txt

Sign the first page of "contract.pdf" with the signature "sig.png":

signpdf contract.pdf sig.png --coords 1x100x100x150x40

Coordinates format is: <pagenum>x<x-coord>x<y-coord>x<width>x<height>.

• <pagenum> the page number, count starts at 1.
• <x-coord> horizontal distance from bottom-left corner in PDF units (1/72 inch).
• <y-coord> vertical distance from bottom-left corner in PDF units (1/72 inch).
• <width> width of signature in PDF units (1/72 inch).
• <height> height of signature in PDF units (1/72 inch)

Other options:

• --date Append a date to the right of the signature.
• --output Destination filename. Default is to append _signed to the incoming PDF name.

For more usage details, run signpdf --help.