.htaccess How to REDIRECT all but the main one?

Question

htaccess

Good afternoon.
On the site https://site.ru it is not possible to use the position
Redirect 301 from a page without .html to a page with .html

RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^([^.]+)$ /$1.html [R=301,L]

because then the main page also falls under this redirect.
Tell me how to make a redirect for all https://site.ru/page1 to https://site.ru/page1.html
EXCEPT MAIN https://site.ru

Answer 1

You can add a condition , although this is not necessary as it already provides an exception for the main. RewriteCond %{REQUEST_URI} !^/$RewriteRule ^([^.]+)$