I needed to embed a couple of additional images into a HTML file. The output file already had a couple of base64 encoded SVGs within it, so I decided to try doing the same with the additional images.

Instead of using an online encoding service I tried to find if I could do it in PowerShell. I found the following solution.

[Convert]::ToBase64String((Get-Content -Path .\myImage.png -Encoding Byte)) >> myImage.txt

Explainer

[Convert]::ToBase64String calls the ToBase64String method of the .NET Conversion class. Essentially using a .NET library to do the lifting.

I then pass PowerShells Get-Content cmdlet as an argument with the path to the image.

>> simply redirects the output of the Convert method to a text file.

I can then paste the output of the text file into the HTML <img> tag.