Vim Tips Wiki

Changing all HTML tags to lowercase

Redirected from VimTip1513

1,624pages on
this wiki
Add New Page
Talk0 Share
Tip 1513 Printable Monobook Previous Next

created 2007 · complexity intermediate · author Alex Jakushev · version 6.0

One part of converting from HTML to XHTML is changing all the tags to lowercase. If you open your HTML file in Vim, this task may be done with this piece of Vim magic:

:%s/<\/\?\zs\(\a\+\)\ze[ >]/\L\1/g

Note that this will change tag names only. To change tag attributes to lowercase as well (multiple attributes supported), use this command:



This should work as well:

This is exactly what I thought of to start with. It is a nice, simple, easy regular expression to accomplish almost the same task. But, it is not quite equivalent. The two regular expressions given in the tip would replace <TAG ATTR='VAL'> with <tag attr='VAL'>, whereas this one would replace it with <tag attr='val'>. Sometimes this is desired, sometimes not, for example with <p class='bigLongClassName'>. Note that none of these regular expressions will work across linebreaks.

The first search pattern does not recognize tags that have digits in it, like <H1>. It can be corrected replacing the \a (=any alphabetic character) by a \w (=any word character) which includes digits.

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.

Also on Fandom

Random Wiki