Using .htaccess To Append .html Behind Url Path

People are coming into my website like this: sitename.com/brands/brandA But this will cause an 404 error because I actually need them to come to this url sitename.com/brands/brandA

Solution 1:

why don't you try this.

RewriteEngine On
RewriteRule ^/brands/(.*)$ /brands/$1.html [L]

Solution 2:

You can use mod_negotiation for this, too:

<IfModulemod_negotiation.c>
  Options +MultiViews
</IfModule>

If a request comes in, that would result in a 404, mod_negotiation takes other headers like the Accept into account and looks for files with the same base name but appropriate extensions.