How to Remove .html and .php extension from Url using .htaccess

Removing .php Extension from URL For example, You need to change the URL from http://test.com/test.php to
http://test.com/test1. Edit the .htaccess file and add the following settings.

RewriteEngine On RewriteCond %{REQUEST_FILENAME}
!-f RewriteRule ^([^.]+)$ $1.php [NC,L`]

Now, If the user accessed /test in the browser, it will show the from /test.php.But still, if any user typed the completed URL as http://test.com/test1.php, this will not redirect. Now you need to add some more rules to the
.htaccess file.

RewriteEngine on RewriteCond %{THE_REQUEST}
/([^.]+)\.php [NC] RewriteRule ^ /%1 [NC,L,R] RewriteCond
%{REQUEST_FILENAME}.php -f RewriteRule ^ %
{REQUEST_URI}.php [NC,L]

Removing .html Extension from URL For example, you need to convert your URL from http://test.com/test.html to
http://example.com/test. Edit .htaccess file and add the following setting

RewriteEngine On RewriteCond %{REQUEST_FILENAME}
!-f RewriteRule ^([^.]+)$ $1.html [NC,L]

Now, If the user accessed /demo in the browser, it will show the content from /test.html. Now, You may need to redirect users which typed complete URL as http://test.com/test1.html to the new URL http://test.com/test

RewriteEngine on RewriteCond %{THE_REQUEST}
/([^.]+)\.html [NC] RewriteRule ^ /%1 [NC,L,R] RewriteCond
%{REQUEST_FILENAME}.html -f RewriteRule ^ %
{REQUEST_URI}.html [NC,L]

Forcefully https redirection .htaccess file sample

RewriteEngine On
RewriteCond %{HTTPS} !=on
#RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301,NE]
#Header always set Content-Security-Policy "upgrade-insecure-requests;"
#RewriteCond %{HTTP_HOST} ^www\.(.+)$ [NC]
#RewriteRule ^(.*)$ https://%1/$1 [R=301,L]
RewriteCond %{HTTPS}::%{HTTP_HOST} ^off::(?:www\.)?(.+)$
RewriteRule ^ https://www.%1%{REQUEST_URI} [NE,L,R]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*) index.php