This is a console tool in Net core 2.0 that allow you to read images and convert to HTML image tag using base64 codification.
This tool is very useful for create rich content and use inside HTML email content for prevent incompatibilities.
The tool read images from a specified directory and generates HMTL file with the img tags.
img2htm <path>
<path> The path must be contains images in the top level.
In the same directory the tool generates the file ImagesAsBase64.html. This file
contains images as base64 format and the attribute title with the file name.
Use Img Base64 generated tag like this:
Use like a style to apply:
<body>
<style>
.smilestyle:after { content: url('data:image/jpg;base64,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') }
</style>
<div class="smilestyle"></div>
</body>
This allow you to use the image multiple times in the same mail and save mail size.
Remember: don't use <head> tag in email content nd prevent use elements with background image style.
Use like a style for apply:
<img title="smile.jpg" src="data:image/jpg;base64,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" />