$ yj -h
Usage: yj [-][ytjcrneikhv]
Convert between YAML, TOML, JSON, and HCL.
Preserves map order.
-x[x] Convert using stdin. Valid options:
-yj, -y = YAML to JSON (default)
-yy = YAML to YAML
-yt = YAML to TOML
-yc = YAML to HCL
-tj, -t = TOML to JSON
-ty = TOML to YAML
-tt = TOML to TOML
-tc = TOML to HCL
-jj = JSON to JSON
-jy, -r = JSON to YAML
-jt = JSON to TOML
-jc = JSON to HCL
-cy = HCL to YAML
-ct = HCL to TOML
-cj, -c = HCL to JSON
-cc = HCL to HCL
-n Do not covert inf, -inf, and NaN to/from strings (YAML or TOML only)
-e Escape HTML (JSON out only)
-i Indent output (JSON or TOML out only)
-k Attempt to parse keys as objects or numeric types (YAML out only)
-h Show this help message
-v Show version