Another old format in that space is&#x2F;was MHTML - a MIME document with all the resources needed for a webpage. <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;MHTML" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;MHTML</a>