26.04.2021, 18:05
There is a commercial standalone LUTCalc app ($5 or something so) for those who afraid that github site will go down 
LUTCalc may look complicated (and it is complicated, because it have a lot of advanced options), but in reality in most cases all you need is just select input colorspace/gamma, output color space/gamma and desired LUT resolution (x33 is usually enough for video.) The rest of settings are usually auto adjusted, so no need to touch any other. Click to "auto generate name" and save LUT.
LUTCalc may look complicated (and it is complicated, because it have a lot of advanced options), but in reality in most cases all you need is just select input colorspace/gamma, output color space/gamma and desired LUT resolution (x33 is usually enough for video.) The rest of settings are usually auto adjusted, so no need to touch any other. Click to "auto generate name" and save LUT.