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For example, this is the entry of Superuser when I opened bookmark html in notepad.

<DT><A HREF="https://superuser.com/" ADD_DATE="1674863395" ICON="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAABT0lEQVQ4jZXSPWtUURCH8d+5eUFiksUXYieWopgughAt/AZKsLKw0W9gY7UgpkljJWgREFIEk7XWwlRCsNZC2zQR2Y0rRIxx94yFBi7rRe79d+fM8PDMMPzJYwQywrGZZ2Bt561O98BG742X/esqUoy8N3BHmlgFh98fMvZIEZdEfm1z73YVpGxwv7L6ondFZ29gs/vFWm/2fwbVuXVqW8SOVJx2PM6XS+O1ACAOBaKYbGIQCPeeTgiklEYb6owQvu7OiMgiQmg1ASQULuo72H/112BZp7ugHUVdA9rtbOiBnJ9gXqRt7ZRpssTZ6QsUNxFSeld3hFLGlkWcwYr3J642B4RzUkoirR/p0+gOEBHGDcpf9QEpEv/ewSjgGn6abn2w/23L6sclrbk5OaaEs0Q2iF9VgB/oYxGLhsPn2DI5dReXFQk+S9bdOPmpDPgNmQZy6panbMoAAAAASUVORK5CYII=">Super User</A>

As you can see, it's a long-winded string for Icon parameter.

What is this and why does it have to be so long? Can I not shorten this?

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  • Please clarify your specific problem or provide additional details to highlight exactly what you need. As it's currently written, it's hard to tell exactly what you're asking.
    – Community Bot
    Jan 28, 2023 at 0:49
  • Use a web link shorten tool. Lots around. ....... shorturl.at
    – John
    Jan 28, 2023 at 0:51

1 Answer 1

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What is this

It is a Data URL.

and why does it have to be so long

It is a whole file as base64 in a url.

Should you shorten it

No, it doesn't make much of a difference and in the html file itself is written

<!-- This is an automatically generated file.
     It will be read and overwritten.
     DO NOT EDIT! -->

How can you shorten this

You can shorten it by grabbing the Favicon from the head of the website and replacing the Data URL with it.

In your example it would be https://cdn.sstatic.net/Sites/superuser/Img/favicon.ico

So your bookmark would be <DT><A HREF="https://superuser.com/" ADD_DATE="1674863395" ICON="https://cdn.sstatic.net/Sites/superuser/Img/favicon.ico">Super User</A>

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