How do I tidy up an HTML file's indentation in VI?

There's several things that all need to be in place. Just to summarize them all in one location:

Set the following option:

:filetype indent on
:set filetype=html           # abbrev -  :set ft=html
:set smartindent             # abbrev -  :set si

Then either move the cursor to the top of the file and indent to the end: gg =G
Or select the desired text to indent and hit = to indent it.

Note that in vim 7.4 the html tags html, head, body, and some others are not indented by default. This makes sense, as nearly all content in an html file falls under those tags. If you really want to, you can get those tags to be indented like so:

:let g:html_indent_inctags = "html,body,head,tbody" 

See here and here for more information.

The main problem using the smart indentation is that if the XML (or HTML) sits on one line as it may end up coming back from a curl request then gg=G won't do the trick. Instead I have just experienced a good indentation using tidy directly called from VI:

:!tidy -mi -xml -wrap 0 %

This basically tells VI to call tidy to cleanup an XML file not wrapping the lines to make them fit on the default 68 characters wide lines. I processed a large 29MB XML file and it took 5 or 6 seconds. I guess for an HTML file the command should therefore be:

:!tidy -mi -html -wrap 0 %

Hope this could help.

This is my solution that works nicely for opening "ugly" HTML in a nicely spaced way:

vim fileIn.html -c "set sw=2 | %s/>/>\r/ | execute 'normal gg=G' | set nohlsearch | g/^\\s*\$/d"

The sw command is because my default is 4, which is too high for HTML.

The next part adds a newline (Vim thinks it's a carriage return, sigh) after each element (>)

Then re-indent the entire file with =

Then unhighlight > (since I have set hlsearch in my vimrc)

Then remove all empty / whitespace-only lines (see here for more, also this is double-escaped because it's in the shell)

You can even add | wq! fileOut.html to the end if you don't want to enter Vim at all, but just clean up the file.

I use this script: https://github.com/maksimr/vim-jsbeautify

In the above link you have all the info:

1. Install
2. Configure (copy from the first example)
3. Run :call HtmlBeautify()

Does the job beautifully!

Have you tried using the HTML indentation script on the Vim site?

• http://www.vim.org/scripts/script.php?script_id=2075

Here's a heavy-weight solution that gets you indenting, plus all the HTML pretty-printing you don't necessarily want to care about while you're editing.

First, download Tidy. Make sure you add the binary to your path, so you can call it from any location.

Next, create a config file describing your favorite HTML flavor. Documentation is not great for Tidy, but here's an overview, and a list of all the options. Here's my config file:

bare: yes
break-before-br: no
clean: yes
drop-proprietary-attributes: yes
fix-uri: yes
indent-spaces: 4
indent: yes
logical-emphasis: yes
markup: yes
output-xhtml: yes
quiet: yes
quote-marks: yes
replace-color: yes
tab-size: 4
uppercase-tags: no
vertical-space: yes
word-2000: yes
wrap: 0

Save this as tidyrc_html.txt in your ftplugin folder (under vimfiles).

One more file: add the following line to (or create) html.vim, also in ftplugin:

map <leader>tidy :%! tidy -config ~/vimfiles/ftplugin/tidyrc_html.txt <CR>

To use it, just open an HTML file, and type /tidy. (That / is the <leader> key.)

There you go! Not a quick solution, by any means, but now you're a bit better equipped for editing those huge, messed-up HTML files.

You can integrate both tidy and html-beautify automatically by installing the plugin vim-autoformat. After that, you can execute whichever formatter is installed with a single keystroke.