Restores WordPress default functionality prior to version 4.7 where image ALT attributes were automatically generated and put into the HTML code. The ALT attributes were generated from the Caption (if it exists) else from the Title (if it exists) of the image in the Media Library. This plugin utilises Titles in generating ALT text, but does not utilise Captions. The Title used by this plugin, is the main Title of the image as found in the Media Library, not the HTML TITLE attribute of the image (that is something else, which this plugin ignores).

Automatic image ALT attributes

This feature is a time saver for me as my site is image oriented.

Thanks

Automatically generates ALT attributes in image HTML. Restoring WordPress < 4.7 functionality.

Mario Peshev

DevriX

Lachezar Gadzhev

DX Webp Picture Tag Image Wrapper filters the content and replaces the img tags with picture tags by adding two sources – one with the image followed by .webp extension 
and one with the original image.
The plugin supports jpg, jpeg and png formats
Your site needs to support Webp images
DX Webp Picture Tag Image Wrapper resolves the issue with Accept header on Safari that doesn’t include the webp format. Using the picture tag 
allows the browser to render Webp images, if they are supported, without relying on that header

DX Webp Picture Tag Image Wrapper

Automatically wraps content images in picture tag by making one of the sources webp. It supports Gutenberg content

Automatic image ALT attributes vs DX Webp Picture Tag Image Wrapper