PDFCrowd might be a bit more popular than HalftonePro. We know about 1 link to it since March 2021 and only 1 link to HalftonePro. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
You can do it easily on https://halftonepro.com but I think I payed a $10 one off fee for a log in - there might be a free trial. Source: almost 2 years ago
To follow on with this, I've used https://pdfcrowd.com/ too. Source: about 3 years ago
Breathing Halftone - Images go whoa with lots of floaty dots
pdflayer - Free, powerful HTML to PDF API supporting both URL and raw HTML conversion. Unlimited document size, lightning-fast and compatible PHP, Python, Ruby, etc.
Atlas Of Emotions - Interactive site for inner peace, by The Dalai Lama
DocRaptor - As the only API powered by the Prince HTML-to-PDF engine, DocRaptor provides the best support for complex PDFs with powerful support for headers, page breaks, page numbers, flexbox, watermarks, accessible PDFs, and much more
Mind Hero - Peace, anytime & anywhere
PDFShift - Convert any HTML documents to high-fidelity PDF using a single POST request