PDFCrowd might be a bit more popular than Tressel.xyz. We know about 1 link to it since March 2021 and only 1 link to Tressel.xyz. 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.
Hey, Tressel does this (disclaimer - I created it) - there's a free version where you can comment publicly to save a post/comment or a premium version where you can save via your bookmarks. Source: almost 2 years ago
To follow on with this, I've used https://pdfcrowd.com/ too. Source: over 3 years ago
Readwise - Effortlessly rediscover and organize your Kindle highlights
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.
Clippings.io - Organize the notes you make on your Kindle
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
Notion API - Connect Notion to the tools you use every day
PDFShift - Convert any HTML documents to high-fidelity PDF using a single POST request