HTML Error Checker
Check the HTML for error. This doesn't send the source to the external. If web page behavior is not correct, you should turn off it.
PageRip (HTML + CSS Extract)
Rip HTML + CSS snippets from any element on any web page with an element selector. Convert full webpages to single file HTML and JSX
HTML To PDF With Google Drive
View HTML file directly in browser. Get a HTML text and generate a PDF file to make it printer-friendly. Convert raw HTML to PDF.