diff --git a/nvim/.config/nvim/lua/plug/_format.lua b/nvim/.config/nvim/lua/plug/_format.lua
index abc2630..815e837 100644
--- a/nvim/.config/nvim/lua/plug/_format.lua
+++ b/nvim/.config/nvim/lua/plug/_format.lua
@@ -2,22 +2,14 @@ local augroup = require('helpers.augroup')
 
 -- for each filetype autoformat on save
 -- TODO can automatically gather from formatter table keys?
-local filetypes =
-    'bash,cpp,go,html,javascript,lua,python,rust,sh,typescript,zsh'
-augroup({
-    {
-        'FileType', filetypes, 'autocmd', 'BufWritePost', '<buffer>',
-        'FormatWrite'
-    }
-}, 'formatonsave')
-
 local prettierfmt = {
     function()
+        local set_quotes = "--single-quote"
+        if vim.bo.filetype == "json" then set_quotes = "--double-quote" end
         return {
             exe = "prettier",
             args = {
-                "--stdin-filepath", vim.api.nvim_buf_get_name(0),
-                '--single-quote'
+                "--stdin-filepath", vim.api.nvim_buf_get_name(0), set_quotes
             },
             stdin = true
         }
@@ -27,44 +19,44 @@ local shfmt = {
     function() return {exe = "shfmt", args = {"-i 4"}, stdin = true} end
 }
 
-require('formatter').setup({
-    logging = false,
-    filetype = {
-        bash = shfmt,
-        cpp = {
-            function()
-                return {
-                    exe = "clang-format",
-                    args = {},
-                    stdin = true,
-                    cwd = vim.fn.expand('%:p:h') -- Run clang-format in cwd of the file.
-                }
-            end
-        },
-        go = {function() return {exe = "goimports", stdin = true} end},
-        html = prettierfmt,
-        javascript = prettierfmt,
-        lua = {
-            function()
-                return {
-                    exe = "lua-format",
-                    args = {"--indent-width", 4},
-                    stdin = true
-                }
-            end
-        },
-        python = {
-            function()
-                return {exe = "black", args = {"-"}, stdin = true}
-            end
-        },
-        rust = {
-            function()
-                return {exe = "rustfmt", args = {"--emit=stdout"}, stdin = true}
-            end
-        },
-        sh = shfmt,
-        typescript = prettierfmt,
-        zsh = shfmt
-    }
-})
+local formatters = {
+    bash = shfmt,
+    cpp = {
+        function()
+            return {
+                exe = "clang-format",
+                args = {},
+                stdin = true,
+                cwd = vim.fn.expand('%:p:h') -- Run clang-format in cwd of the file.
+            }
+        end
+    },
+    go = {function() return {exe = "goimports", stdin = true} end},
+    html = prettierfmt,
+    javascript = prettierfmt,
+    json = prettierfmt,
+    lua = {
+        function()
+            return
+                {exe = "lua-format", args = {"--indent-width", 4}, stdin = true}
+        end
+    },
+    python = {function() return {exe = "black", args = {"-"}, stdin = true} end},
+    rust = {
+        function()
+            return {exe = "rustfmt", args = {"--emit=stdout"}, stdin = true}
+        end
+    },
+    sh = shfmt,
+    typescript = prettierfmt,
+    zsh = shfmt
+}
+
+require('formatter').setup({logging = false, filetype = formatters})
+
+-- gather filetypes to autocorrect for each activated formatter above
+local filetype = ""
+for k, _ in pairs(formatters) do filetype = filetype .. "," .. k end
+augroup({
+    {'FileType', filetype, 'autocmd', 'BufWritePost', '<buffer>', 'FormatWrite'}
+}, 'formatonsave')