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The “Embed Image Links” WordPress plugin can save you a lot of time, when creating posts or pages for your website. 
Just paste a link to any online image directly in your text, and this plugin will automatically replace it with the image that it is pointing to. 
Includes options to automatically scale images that are too large for the content area.

Embed Image Links

The "Embed Image Links" WordPress plugin can save you a lot of time, when creating posts or pages for your website.

Creato

Simply upload your icons individually to your theme’s “images/csprite” folder.
Go to WordPress Dashboard > Tools > CSprite > Rebuild to rebuild the sprite.
CSprite will do all the hard work of combining all the images into a single graphic.
It will create all the classes for you in the enqueued stylesheet.
You can then simply use the sprite in your theme like this:
<div class="csprite csprite-creatomatic_logo"></div>
It will name the classes according to the image names, so make sure that they are unique.
Read more about this plugin at http://www.creatomatic.co.uk/csprite-automatic-image-sprite-tool-wordpress/

CSprite

The automatic image sprite generator for WordPress

Embed Image Links vs CSprite