PDFCrowd - Pdfcrowd is a Web/HTML to PDF online service. Convert HTML to PDF online in the browser or in your PHP, Python, Ruby, .NET, Java apps via the REST API.
HTMLAsText - convert HTML documents to simple text files, by removing all HTML tags and formatting the text according to your preferences.
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
WizBrother html2text - This tool can convert your .html files to .txt, quickly. Batch convert Quickly
PDFShift - Convert any HTML documents to high-fidelity PDF using a single POST request
Athena PDF - Elegant, open-source PDF converter.