This is the embeddable version of the Beat Licence Checker. It is free permanently, on any site including a commercial one, with no signup, no API key and no script that tracks your visitors. It reads your page background and renders light or dark to match.

<script src="https://rapcanon.com/embed.js" data-tool="beat-license-checker"></script>

Install notes, the iframe version and the full terms  ·  The tool with its sources and method  ·  The licences this was read from