SVG to CSS Data URL converter with maybe the smallest possible output.

Nathaniel - Jun 3 '23 - - Dev Community

I use something like this all the time — but it was never clear if it produced the optimal output.

So i did a bunch of research and made this:

SVG to CSS converter

It converts SVG to a CSS compatible Data URL for use in attributes like background-image and mask-image.

As far as I'm aware it produces the smallest possible output without compromising backwards compatibility.

We're talking saving a few bytes here and there — but the compounded effect of using this sort of thing all the time should make a bigger difference in the grand scheme of things.

It…

  • only encodes necessary characters
  • changes attribute quotes to single quotes
  • lowercases percent-encoding hex pairs
  • swaps hex colors to their shorter named equivalents
  • adds xlmns attribute if missing
  • removes useless whitespace

There's more information below the tool on the page if you're interested in understanding why it does these things.

Let me know what you think,
enjoy!

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