How to host Google fonts in WordPress theme locally?

Download CSS with info about embedded fonts from Googleapis.com. Example link:

https://fonts.googleapis.com/css2?family=Montserrat:wght@400;700&family=Open+Sans:ital,wght@0,300;0,400;0,600;0,700;1,300;1,400;1,600;1,700&display=swap

Save the file right into your child theme directory so it’s now:

https://www.example.com/wp-content/themes/theme-child/fonts.css

When you open this fonts.css file, there is content which looks like this:

/* latin-ext */
 @font-face {
   font-family: 'Montserrat';
   font-style: normal;
   font-weight: 400;
   font-display: swap;
   src: url(https://fonts.gstatic.com/s/montserrat/v15/JTUSjIg1_i6t8kCHKm459Wdhyzbi.woff2) format('woff2');
   unicode-range: U+0100-024F, U+0259, U+1E00-1EFF, U+2020, U+20A0-20AB, U+20AD-20CF, U+2113, U+2C60-2C7F, U+A720-A7FF;
 }
...

Save font from url in newly created folder fonts in your child theme and replace path in fonts.css so it’s:

src: url(wp-content/themes/theme-child/fonts/JTUSjIg1_i6t8kCHKm459Wdhyzbi.woff2) format('woff2');

In my case, there were 60+ fonts to download. Therefore, I wrote simple PHP Downloader which I will be glad to open-source if somebody asks.

Add fonts.css to your child theme

/**
 * Add local fonts 
 */
 function jasom_add_local_fonts() {
 wp_enqueue_style( 'local-fonts', get_stylesheet_directory_uri() . '/fonts.css', array(), filemtime( dirname( FILE ) . '/fonts.css' ) ); 
 }
 add_action( 'wp_print_styles', 'jasom_add_local_fonts' );

Flush all caches and check the source code for the presence of the following line:

<link rel="stylesheet" id="local-fonts-css" href="https://www.example.com/wp-content/themes/theme-child/fonts.css?ver=1607598699" type="text/css" media="all">

How to deregister existing Google Fonts out of your theme and more in the source.

Follow these steps:

1. Convert 'Raleway' font to web font using Transfonter.
2. Download and upload the converted web font to WordPress via FTP or cpanel, ideally in the wp-content/uploads folder.

3. Now,it's time for adding custom font to css. You will have to change the default URLs in stylesheet.css. For instance, your default URLs in stylesheet.css looks like this:

   src: url('Raleway-Bold.woff2') format('woff2'),
   url('Raleway-Bold.woff') format('woff');
   

   You have to change them in the following way:

   src: url('t9w8m8j8.stackpathcdn.com/http://yourwebsite.com/wp-content/uploads/fonts/Raleway-Regular.woff2') format('woff2'), url('t9w8m8j8.stackpathcdn.com/http://yourwebsite.com/wp-content/uploads/fonts/Raleway-Regular.woff') format('woff');
   

4. Finally test the Raleway font in a test page to check whether it is working or not.

You will find more information about these steps here.

This can be done using a child theme: https://www.cssigniter.com/add-custom-fonts-wordpress-website-using-child-theme I recommend that you test website load speed before and after the change, to make sure there's no negative effect. It is recommended to use a CDN such as Google's.