Yes, Custom JS is free to use. It is available as a free plugin on WordPress.org.

How many websites use Custom JS?

Custom JS has 200 active installations as tracked by WordPress.org.

What are the best Custom JS alternatives?

Popular alternatives to Custom JS include WPCode – Insert Headers and Footers +…, Code Snippets, Simple Custom CSS Plugin. You can compare them side-by-side on our comparison pages.

Does Custom JS work with the latest WordPress?

Custom JS has been tested up to WordPress 4.6.30. It requires WordPress 4.6+ and PHP false+.

PluginSift

Custom JS

Name: Custom JS
Author: seosbg

Custom JS is easy to use. Custom JS WordPress plugin allows you to Custom JS fields in your theme - include js in head or footer.

By seosbg·CSS·Free

·200 active installs·Updated 9 years ago

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As of April 2026, Custom JS is a WordPress css plugin with 200 active installations and a 0/5 rating0. It has been downloaded 3.7K+ times in total. Requires WordPress 4.6+ and PHP false+. Available on WordPress.org since 2016. Last updated 9 years ago — may have compatibility concerns. Top alternative: WPCode – Insert Headers and Footers +….

0/5Rating

200active installs

3.7K+total downloads

10 yearssince 2016

Overview

Custom JS WordPress plugin allows you to Custom JS fields in your theme. Simply amazing and easy to use.
To learn more about the Custom JS plugin please see Plugin URI. See screenshot examples at https://www.seosthemes.com/custom-js/

Read full description on WordPress.org