To embed binary data into web-pages one needs encoding that is friendly to the text encoding that the page uses and uses characters that only the source syntax

To embed binary data into web-pages one needs encoding that is friendly to the text encoding that the page uses and uses characters that only the source syntax allows. Any of this rules out yEnc. Besides, web pages where one embeds the binary data should be transmitted compressed and gzip removes the overhead of base64 down to few percent.