WordPress editor supports inserting images from the clipboard, but the pictures are bad Data:URL type.
This plugin converts image files in PNG format on a server.
Insert a copy of the windows screen in the post or page – a good example for the use of this plugin.
It is very comfortable.
<h3>Arbitrary section 1</h3>

Save Data:URL images

WordPress editor supports inserting images from the clipboard, but the pictures are bad Data:URL type.

crille

Non-ASCII characters can be used in the URL, but they have to be encoded (RFC3986). URL encoding is widely used (e.g. Wikipedia http://ja.wikipedia.org/wiki/Wikipedia:%E9%80%A3%E7%B5%A1%E5%85%88). 
This plugin encodes NON-ASCII characters in the slugs of your pretty permalinks. So your slugs may look like <code>fußball-in-nürnberg</code> or <code>連絡先</code>.

Permalink Encoding

This plugin encodes NON-ASCII characters in pretty permalinks by using Percent-Encoding described in RFC3986.

Save Data:URL images vs Permalink Encoding