Hi @rosa!

No automatic way

A preset contains numbers that set the sliders in an application to a specific position.
But Lightroom and Color.io don't have the same sliders. Even if they did, the sliders in Color.io work differently from the sliders in Lightroom.
So there's unfortunately no automated way to make Lightroom presets work in Color.io (without the use of some non-existing AI technology that understands the proprietary interface and processing engines in both of these applications and translate between them)

Alternative approach

Instead, I'd try to recreate my favorite Lightroom presets with the tools in Color.io - it's actually quite fast. Here's how I have done this in the past:

1. In Color.io, load an unedited reference image into Scene 1
2. Create a second Scene and load the same image with your Lightroom preset applied
3. Adjust the image in Scene 1 to match the image in Scene 2. Start with a Color.io preset or the AI preset generator to get somewhat close, then fine tune in the engine. Quickly toggle between Scenes by pressing the TAB key.

Additional tips

Start by matching the contrast first:

1. Set both the unedited and Lightroom reference image to black and white (using the BW button in Color.io).
2. Play with the luminance curve and RGB mixer until both black and white images look the same.
3. Turn on the Histogram or Waveform Scope. Matching the histogram shape between your images will help!
4. Turn off Black and White to continue with matching the color.
5. Turn on the Vectorscope, waveform or RGB parade overlays to help align the color values.