Are you open to contributions? I would love if there was a non-chromium alternative to wkhtmltopdf!
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This is an experimental project focused on learning and exploration. Networking is basic (http:// and file:// only), and grid layouts aren’t supported yet, but we’re making progress fast.
We’d love your thoughts and feedback.
There's also https://weasyprint.org/ which doesn't use any browser engine, but rather a custom renderer.
And both of those (and Prince) can be used as a backend by Pandoc (https://pandoc.org/)
The first one I found to be unreliable, the second one is super slow and the third can be annoying to work with.