img tag uses XHTML and not HTML5

This can also be seen in the demo on the homepage of TinyMCE.

<img src="images/[e-mail]" alt="TinyMCE" width="110" height="97" />

For HTML5 it should be:

<img src="images/[e-mail]" alt="TinyMCE" width="110" height="97">

A couple sources: W3Schools HTML5 Tutorial

[spocke]

What is correct is defined by the HTML5 specification both
and
are valid so we are not going to change the default behavior if it comes down to a matter of taste. If the HTML5 spec required us to change that would be another case.

Spec where this is defined “then there may be a single “/” (U+002F) character”: https://www.w3.org/TR/html5/syntax.html#start-tags

However we already have an option to allow you to get the html tags you want: https://www.tinymce.com/docs/configure/content-filtering/#element_format

Demo: http://fiddle.tinymce.com/Q6faab

[Tarun80]

Now that option is perfect! Wish I was able to find the docs when I searched earlier for this.

Thank you very much for that useful information @spocke! I’ll make sure it forces html5.