YAMLfmt

yamlfmt is a little Go binary that reads YAML from file(s) or standard input, formats it and then writes it to standard output.

Use in Editors

Vim

Use the following configuration in Vim, to create a "Fmt" command that formats your YAML.

au FileType yaml command! Fmt call YamlFmt(120)
let yaml_fmt = "yamlfmt /dev/stdin"
au FileType yaml let &l:formatprg=yaml_fmt