data:[<MIME-type>][;charset=<encoding>][;base64],<data>
Exemples (more here):
... - it meens <data> - base64 code :)
IMAGE:
GIF: <img src="data:image/gif;base64,..."/>
PNG: <img src="data:image/png;base64,..."/>
JPEG: <img src="data:image/jpeg;base64,..."/>
BMP: <img src="data:image/bmp;base64,..."/>
WEBP: <img src="data:image/webp;base64,..."/>
svg+xml: <img src="data:image/svg+xml;base64,..."/>
TEXT:
PLAIN: href,and other="data:text/plain;base64,..."/>
HTML: href,and other="data:text/html;base64,..."/>
CSS: href,and other="data:text/css;base64,..."/>
JAVASCRIPT: href,and other="data:text/javascript;base64,..."/>
AUDIO:
MIDI: <audio src="data:audio/midi;base64,..."/>
MPEG and MP3: <audio src="data:audio/mpeg;base64,..."/>
WEBM: <audio src="data:audio/webm;base64,..."/>
OGG: <audio src="data:audio/ogg;base64,..."/>
WAV: <audio src="data:audio/wav;base64,..."/>
VIDEO:
<video controls>
<source type="video/webm" src="data:video/webm;base64,...">
<source type="video/mp4" src="data:video/mp4;base64,...">
<source type="video/ogg" src="data:video/ogg;base64,...">
</video>
APPLICATION:
XML: <embed,iframe src="data:application/xml;base64,..."/>
PDF: <embed,iframe src="data:application/pdf;base64,..."/>
???: <embed,iframe src="data:application/octet-stream;base64,..."/>
???: <embed,iframe src="data:application/pkcs12;base64,..."/>
???: <embed,iframe src="data:application/vnd.mspowerpoint;base64,..."/>
???: <embed,iframe src="data:application/xhtml+xml;base64,..."/>