How to convert all text to lowercase in Vim

Question

How do you convert all text in Vim to lowercase? Is it even possible?

Answer 1

• Toggle case "HellO" to "hELLo" with g~ then a movement.
• Uppercase "HellO" to "HELLO" with gU then a movement.
• Lowercase "HellO" to "hello" with gu then a movement.

For examples and more info please read this: http://vim.wikia.com/wiki/Switching_case_of_characters

Answer 2

Many ways to skin a cat... here's the way I just posted about:

:%s/[A-Z]/\L&/g

Likewise for upper case:

:%s/[a-z]/\U&/g

I prefer this way because I am using this construct (:%s/[pattern]/replace/g) all the time so it's more natural.

Answer 3

I assume you want lowercase the text. Solution is pretty simple:

ggVGu

Explanation:

1. gg - goes to first line of text
2. V - turns on Visual selection, in line mode
3. G - goes to end of file (at the moment you have whole text selected)
4. u - lowercase selected area

Answer 4

use this command mode option

ggguG


gg - Goto the first line 
g  - start to converting from current line    
u  - Convert into lower case for all characters
G  - To end of the file.