A Neovim plugin for seamless data format conversion, supporting JSON, Python dict, Unicode sequences and more with extensible architecture.

• Convert selected Python dict text to formatted JSON
• Convert Unicode escape sequences to readable characters (e.g., \u4f60\u597d → 你好)
• Convert readable characters to Unicode escape sequences (e.g., 你好 → \u4f60\u597d)
• Support nested dictionaries and lists
• Automatically convert Python's True/False to JSON's true/false
• Maintain proper indentation and formatting
• [Planned] Support more format conversions (YAML, TOML, XML, etc.)

use {
  'ozawau/nvim-formatter',
  config = function()
    -- Optional configuration
  end
}

Plug 'ozawau/nvim-formatter'

The plugin provides the following commands, which can be used in normal or visual mode:

• :NfPy2Json - Convert Python dict to formatted JSON

  • In normal mode: Convert Python dict on current line
  • In visual mode: Convert selected Python dict text

• :NfDeunicode - Convert Unicode escape sequences to readable characters

  • In normal mode: Convert Unicode on current line
  • In visual mode: Convert Unicode in selected text

• :NfUnicode - Convert readable characters to Unicode escape sequences

  • In normal mode: Convert text on current line
  • In visual mode: Convert selected text

Use :NfPy2Json to convert the following Python dict:

{'callback_url': 'http://127.0.0.1:8080', 'attempts': 15, 'hello': 'world'}

To formatted JSON:

{
  "callback_url": "http://127.0.0.1:8080",
  "attempts": 15,
  "hello": "world"
}

Use :NfDeunicode to convert Unicode escape sequences to readable text:

{"hello": "\u4f60\u597d"} → {"hello": "你好"}

Use :NfUnicode to convert readable text to Unicode escape sequences:

{"hello": "你好"} → {"hello": "\u4f60\u597d"}

You can add custom keybindings in your Neovim config:

" Map <leader>pj to NfPy2Json command in normal and visual mode
nnoremap <leader>pj :NfPy2Json<CR>
vnoremap <leader>pj :NfPy2Json<CR>

" Map <leader>du to NfDeunicode command in normal and visual mode
nnoremap <leader>du :NfDeunicode<CR>
vnoremap <leader>du :NfDeunicode<CR>

" Map <leader>tu to NfUnicode command in normal and visual mode
nnoremap <leader>tu :NfUnicode<CR>
vnoremap <leader>tu :NfUnicode<CR>

Or in Lua config:

vim.keymap.set('n', '<leader>pj', ':NfPy2Json<CR>', { noremap = true, silent = true })
vim.keymap.set('v', '<leader>pj', ':NfPy2Json<CR>', { noremap = true, silent = true })
vim.keymap.set('n', '<leader>du', ':NfDeunicode<CR>', { noremap = true, silent = true })
vim.keymap.set('v', '<leader>du', ':NfDeunicode<CR>', { noremap = true, silent = true })
vim.keymap.set('n', '<leader>tu', ':NfUnicode<CR>', { noremap = true, silent = true })
vim.keymap.set('v', '<leader>tu', ':NfUnicode<CR>', { noremap = true, silent = true })

The plugin is organized with an extensible modular architecture:

• nvim-formatter - Main module that imports all formatters
  • py2json - Python dict to JSON converter
  • unicode - Unicode escape sequence converter
  • (future modules for additional formats)

• The plugin uses Lua's pattern matching for conversions
• For Python dict conversion, ensure your dict is properly formatted to avoid parsing errors
• Unicode conversion works with \uXXXX format escape sequences

MIT