diff --git a/autoload/maximizer.vim b/autoload/maximizer.vim
new file mode 100644
index 0000000..e752962
--- /dev/null
+++ b/autoload/maximizer.vim
@@ -0,0 +1,25 @@
+fun! maximizer#maximize()
+    let t:maximizer_sizes = { 'before': winrestcmd() }
+    vert resize | resize
+    let t:maximizer_sizes.after = winrestcmd()
+    normal! ze
+endfun
+
+fun! maximizer#restore()
+    if exists('t:maximizer_sizes')
+        silent! exe t:maximizer_sizes.before
+        if t:maximizer_sizes.before != winrestcmd()
+            wincmd =
+        endif
+        unlet t:maximizer_sizes
+        normal! ze
+    end
+endfun
+
+fun! maximizer#toggle(force)
+    if exists('t:maximizer_sizes') && (a:force || (t:maximizer_sizes.after == winrestcmd()))
+        call maximizer#restore()
+    elseif winnr('$') > 1
+        call maximizer#maximize()
+    endif
+endfun
diff --git a/plugin/maximizer.vim b/plugin/maximizer.vim
index 206d63b..2a405ea 100644
--- a/plugin/maximizer.vim
+++ b/plugin/maximizer.vim
@@ -39,7 +39,7 @@ if !exists('g:maximizer_default_mapping_key')
     let g:maximizer_default_mapping_key = '<F3>'
 endif
 
-command! -bang -nargs=0 -range MaximizerToggle :call s:toggle(<bang>0)
+command! -bang -nargs=0 -range MaximizerToggle :call maximizer#toggle(<bang>0)
 
 if g:maximizer_set_default_mapping
     let command = ':MaximizerToggle'
@@ -53,35 +53,9 @@ if g:maximizer_set_default_mapping
     silent! exe 'inoremap <silent>' . g:maximizer_default_mapping_key . ' <C-o>' . command . '<CR>'
 endif
 
-fun! s:maximize()
-    let t:maximizer_sizes = { 'before': winrestcmd() }
-    vert resize | resize
-    let t:maximizer_sizes.after = winrestcmd()
-    normal! ze
-endfun
-
-fun! s:restore()
-    if exists('t:maximizer_sizes')
-        silent! exe t:maximizer_sizes.before
-        if t:maximizer_sizes.before != winrestcmd()
-            wincmd =
-        endif
-        unlet t:maximizer_sizes
-        normal! ze
-    end
-endfun
-
-fun! s:toggle(force)
-    if exists('t:maximizer_sizes') && (a:force || (t:maximizer_sizes.after == winrestcmd()))
-        call s:restore()
-    elseif winnr('$') > 1
-        call s:maximize()
-    endif
-endfun
-
 if g:maximizer_restore_on_winleave
     augroup maximizer
         au!
-        au WinLeave * call s:restore()
+        au WinLeave * call maximizer#restore()
     augroup END
 endif