Custom JS lets you add JavaScript (analytics, tag managers, chat widgets, pixels, your own scripts) to WordPress without editing theme files.

Features

Head, Body and Footer code – including the new “after ” location (Google Tag Manager noscript etc.).
Unlimited snippets – named pieces of code you can switch on/off, duplicate and organise.
Conditions per snippet – front page, blog, posts, pages, archives, search, 404, specific IDs/slugs, URL rules with wildcards, exclusions.
Visitor targeting – everyone, logged-in, logged-out, non-admins, specific user roles, desktop or mobile.
Scheduling – start and end date/time for campaigns and promos.
External scripts – add a script by URL with async / defer / type=”module”.
Auto-wrap – paste plain JavaScript, the plugin adds the
Load jQuery on demand for snippets that need it.
Admin area and login page code.
Per-page code – a “Custom JS” box on the post/page edit screen, with an option to switch off the global code on that page.
Code editor with syntax highlighting, line numbers, linting and an optional dark theme. Ctrl+S / Cmd+S to save.
Revisions – every save is kept; view and restore older versions.
Import / Export to JSON – backups and moving between sites.
Safe mode – ?cjs_safe_mode=1 or define( 'CJS_SAFE_MODE', true ); disables all custom code if something breaks.
Kill switch, “do not load for admins” (keeps your visits out of analytics), HTML comment markers for debugging.
Secure – nonces on every action; on multisite only super admins can add code.
Developer filters: cjs_capability, cjs_front_allowed, cjs_snippet_should_run, cjs_snippet_code, cjs_output_{option}, cjs_metabox_post_types.

Free WordPress Themes by SEOS Themes

Custom JS is made by SEOS Themes – the team behind high quality, HTML5, responsive and mobile friendly WordPress themes, downloaded more than 2,000,000 times.

Blog, news & magazine, online shop, business, real estate, restaurant, photography, music, portfolio and many more – most of them completely free.

Browse all themes at seosthemes.com