Yq

yq

yq is a lightweight and portable command-line YAML processor

https://mikefarah.gitbook.io/yq/

a lightweight and portable command-line YAML processor. yq uses jq like syntax but works with yaml files as well as json. It doesn't yet support everything jq does - but it does support the most common operations and functions, and more is being added continuously.
yq is written in go - so you can download a dependency free binary for your platform and you are good to go! If you prefer there are a variety of package managers that can be used as well as docker, all listed below.

Convert YAML to JSON

yq eval file.yaml -o json
yq e file.yaml -o j