There are two SCART/HDMI scenarios:
One is where you have an old device such as a satellite box or DVD player that has a SCART connector for the output and you are attempting to connect this to a modern TV that only has HDMI connectors on the inputs.
The other scenario is where the satellite box/DVD player is newer only has an HDMI output and you're attempting to connect this to an older TV that only has a SCART connector as the input.
The two scenarios require two different solutions.
For the first scenario you need something like this:
https://www.amazon.co.uk/MISOTT-Scaler- ... ljaz10cnVlFor the second scenario you need a much more complex piece of equipment, and deep pockets. To be honest, in this situation you'd be better-off dumping the old SCART only TV and buying one with HDMI inputs.
Pete.