Milan Dinić

This plugin automatically disables frontend database query for Custom CSS and Customizer section for setting Custom CSS, without need to manually choose any setting or option.
It is a very lightweight, it has no settings, just activate it and it works immediately.
And it’s on <a href="https://github.com/dimadin/disable-custom-css" rel="nofollow ugc">GitHub</a>.

Disable Custom CSS

Disable frontend database query and Customizer section for Custom CSS.

FRESHFACE

Create custom CSS and JS codes. Delivered with our awesome Conditional Logic, you can easily specify 
where you want to your custom CSS code appear. You can write your CSS and JS codes inside 
nice ACE editor with syntax highlighter.Codes will be still presented, after you change the theme, 
so this is really good way to write CSS adjustments into your theme.

Custom CSS

Although this plugin does what it's supposed to I don't want to keep clicking the "buy pro version" button because it is the same color and exactly below the standard WordPress update button in the Publish metabox.  Putting it in that spot with that color is deceptive, if your plugin is good and useful people will upgrade to pro naturally, you don't need to trick anyone into clicking - this isn't SEO!

Pro version promotion over the top

Worthless. Just trys to force you to buy the 100 version

Worthless as a free app

No way to add ANY custom code, but there is a huge "upgrade to premium" button.

Add custom CSS, JS, PHP, tracking code. Very easy to use!

Disable Custom CSS vs Custom CSS