Pretty print json contains python style coments, string literal.

pip3 install pretty-format-json

Yaml and CSV write works fine in Python3 but not in Python2

• pretty_format_json: parse NodeJS style, Python style text to JSON
• csv_json: Convert between CSV and JSON
• yaml_json: Convert between Yaml and JSON

Add noremap <a-j> :%!pretty_format_json<CR> (or your key binding) to your config file.

noremap <a-j> :%!pretty_format_json<CR>
noremap <a-k> :%!yaml_json<CR>
noremap <a-c> :%!csv_json<CR>

When you open a blank buffer, paste the text copied from somewhere into, then use Alt+j to convert to JSON, use Alt-k to convert to Yaml and back to JSON.