MarkLord is a tool to add a visible watermark to images or PDF files on documents (e.g. ID card, salary slips, etc. ) you need to send to third parties. If the said third party is victim of a data breach, it will be more difficult for attackers to use those documents to steal your identity. Also if you put the name of the third party into the watermark, you can identify the source of the leak, or the third party that shared or sold your files without your consent.
pip install marklord
git clone https://github.com/secdev/marklord.git cd marklord pip install .
usage: marklord [-h] [--output OUTPUT] [--font-name FONT_NAME] [--angle ANGLE] [--watermark_lines WATERMARK_LINES] [--interlining INTERLINING] [--separator SEPARATOR] [--no-noise] [--color COLOR] [--alpha ALPHA] [--quiet] input text [text ...]
positional arguments:
input
text
options:
-h, --help show this help message and exit
--output, -o OUTPUT
--font-name, -f FONT_NAME
--angle, -a ANGLE
--watermark_lines, -l WATERMARK_LINES
--interlining, -I INTERLINING
--separator, -s SEPARATOR
--no-noise
--color, -c COLOR RGBA color (hexa or 4 comma separated decimal numbers from 0 to 255)
--alpha, -A ALPHA transparency coefficient between 0% and 100%
--quiet, -q
$ marklord idcard.jpg "only for ACME company 2025-12-04"
INFO:MarkLord:Opening [/home/specimen/idcard.jpg] (53.2 KB)
INFO:MarkLord:Watermarking [only for ACME company 2025-12-04]
INFO:MarkLord:Result saved to [/home/specimen/idcard-wm.jpg] (60.1 KB)
