CKEditor - Real-time collaborative future-ready rich text editor

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.

Summernote - Summernote is a JavaScript library that helps users create WYSIWYG editors online.

Doczilla - Effortlessly create stunning PDFs and screenshots. Seamlessly store them in your own AWS or Google Cloud Storage bucket, putting the control and creativity right at your fingertips.

Froala Editor - Froala Editor is a WYSIWYG HTML editor that enables rich text editing capabilities for the applications.

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