https://github.com/mjkoster/txt2json
I use YAML also, but wanted something closer to JSON syntactically.
Then I discovered HJSON and TOML in the config language space and thought I would share my results here where there has been some discussion.
The main feature of txt2json is blocks: "" - quoted strings for use when a string looks like a number or boolean or contains whitespace {} - JSON object [] - JSON array // - Comment block, removed in output
see examples in the txt2json github repository