PDFCrowd might be a bit more popular than Diagram-JS. We know about 1 link to it since March 2021 and only 1 link to Diagram-JS. 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.
❔diagram-js - Seems nice, but I don't really like how demos look. Source: 10 months ago
To follow on with this, I've used https://pdfcrowd.com/ too. Source: about 3 years ago
GoJS - GoJS is a JavaScript library for building interactive diagrams on HTML web pages. Build apps with flowcharts, org charts, BPMN, UML, modeling, and other visual graph types.
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
mxGraph - mxGraph is a fully client side JavaScript diagramming library - jgraph/mxgraph
PDFShift - Convert any HTML documents to high-fidelity PDF using a single POST request
jsPlumb - jsPlumb is an advanced, standards-compliant and easy to use JS library for building connectivity based applications, such as flowcharts, process flow diagrams, sequence diagrams, organisation charts, etc. More than just a diagram library.
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.