Break a long line but without spaces, with vim

Question

There is multiple questions closed to this one, but without the same parameters, and I don't find an answer to my problem.

I have a very long long line whitout whitespaces (base64), that I want to break in multiple lines.

Some answers in the site are to use gq, but without whitespaces, it do not work...

Maybe is it another command ?

Answer 1

You can use this command, replacing 10 with the desired width:

:s/.\{10}/&\r/g

It substitutes each group of 10 characters (.\{10}) with itself (&) followed by a newline, (\r).

Answer 2

You can use :substitute to place a newline character (\r) into the long line after (\zs starts the match only there) every N (\{N}, with g flag) non-whitespace (\S; could also simply use .) characters:

:s/\S\{10}\zs/\r/g