convert xml file to json file or json file to xml file.

• you should use sublime package manager
• use cmd+shift+P then Package Control: Install Package
• look for xml2json and install it.
• OR, Clone or unpack to "xml2json" folder inside "Packages" of your Sublime installation.

• use cmd+shift+P then xml2json or json2xml (opens result in a new unsaved buffer)
• use cmd+shift+P then xml2json (Save to file) or json2xml (Save to file) to save next to the source file (e.g. abc.xml -> abc.json, abc.json -> abc.xml); if the target exists you will be asked whether to overwrite, and choosing not to overwrite leaves the result in an unsaved buffer
• use cmd+shift+P then Pretty JSON, Pretty XML, Compact JSON or Compact XML to format the current buffer without saving
• or goto menubar Tools then xml2json
• or bind some key in your user key binding:

  {
   "keys": ["ctrl+alt+shift+j"],
   "command": "xml2json"
  },
  {
   "keys": ["ctrl+alt+shift+l"],
   "command": "json2xml"
  }

• empty_tag_style: how empty tags are written when generating XML. compact (<tag/>, default), spaced (<tag />), expanded (<tag></tag>).
• pretty_json_indent: indentation size for pretty JSON (default 2).
• pretty_xml_indent: indentation size for pretty XML (default 2).
• default_conversion_pretty: whether conversion commands default to pretty (true/"pretty") or compact (false/"compact"); default true.
• json_ensure_ascii: whether to escape non-ASCII when emitting JSON (default false).
• json_sort_keys: whether to sort keys when emitting JSON (default false).
• normalize_attribute_text_pairs: when converting XML to JSON, convert simple attribute/text pairs (e.g., {"@name": "...", "#text": "..."}) into {name: "...", value: "..."} (default true).
• attribute_text_value_key: key name to store text content when normalize_attribute_text_pairs is enabled (default "value").
• default_xml_root_name: fallback root element name when wrapping JSON that lacks a single root (default "root").
• include_xml_declaration: include <?xml version="1.0" encoding="utf-8"?> when converting JSON to XML (default true).
• line_ending: line endings for generated output: auto (preserve from source), unix (\n), windows (\r\n), mac (\r) (default auto).
• ensure_final_newline: ensure generated output ends with a newline (default true).
• trim_trailing_whitespace: trim trailing spaces/tabs on generated lines (default true; removes spaces after commas in pretty JSON).

You can adjust plugin settings and shortcuts via Sublime Text -> Settings -> Package Settings -> xml2json -> Settings and Key Bindings.