Ryan

Easily add custom JavaScript or CSS to a single post or page.
When activated, a new icon is added to the post edit page near the icon you use 
to add media to a post. Clicking the new icon brings up a screen where you can 
insert JavaScript and CSS that will be included with the current post.
Anything entered into the text field on the JavaScript tab will be inserted into 
the <head> section of your web page. Same is true of the CSS tab. This allows 
you to insert arbitrary JavaScript and CSS into any post or page you would 
like without having to resort to loading it on all pages.

Insert JavaScript and CSS

Adds fields to the post and page edit pages that allow you to insert custom JavaScript or CSS for that post or page.

Dipak Gajjar

WP Super Minify automatically minifies, compresses, and caches HTML, CSS & JavaScript files (inline and individual) on demand to enhance website’s load speed.
Once activated, the plugin seamlessly compresses HTML, inline CSS, and JavaScript, reducing file sizes for faster page loading. This optimisation helps improve your site’s Google PageSpeed Insights and GTmetrix performance scores.
Additionally, WP Super Minify minifies individual JavaScript and CSS files, ensuring they load correctly and are automatically updated whenever the original files are modified or added — no manual settings needed!
Optimise your website effortlessly and deliver a faster, smoother experience to your visitors.
To check whether this plugin works properly, simply view your site source or press Ctrl + U from your keyboard. In the end of the source, you should see message something like:
*** Total size saved: 11.341% | Size before compression: 27104 bytes | Size after compression: 24030 bytes. ***
Like this plugin? You’ll love my other plugin: <a href="https://wordpress.org/plugins/wp-performance-score-booster/" rel="ugc">WP Performance Score Booster</a>
<h4>Development & Support</h4>
Follow the development of this plugin on <a href="https://github.com/dipakcg/wp-super-minify" rel="nofollow ugc">GitHub</a>.
P.S. It is always the best policy to open a <a href="https://wordpress.org/support/plugin/wp-super-minify" rel="ugc">support thread</a> first before posting any negative review.
<h4>Credits</h4>
A big shoutout to <a href="https://github.com/mrclay/minify" rel="nofollow ugc">Steve Clay</a> and <a href="https://github.com/matthiasmullie/minify" rel="nofollow ugc">Matthias Mullie</a> for sharing their Minify libraries on GitHub. While these libraries are no longer actively maintained, their work has been invaluable, and I sincerely thank them.

WP Super Minify • Minify, Compress and Cache HTML, CSS & JavaScript

A lightweight plugin that automatically minifies, compresses, and caches HTML, CSS, and JavaScript on demand to improve your website’s load speed.

Insert JavaScript and CSS vs WP Super Minify • Minify, Compress and Cache HTML, CSS & JavaScript