#204 by installs
Insert Headers And Footers
Include inline javascript, stylesheets, CSS code or anything you want in Header and Footer areas of your WordPress with ease.
- Installs
- 200,000+
- Rating
- 5.0 (135)
- Updated
- 12 days ago
Simple Custom CSS and JS
Easily add Custom CSS or JS to your website with an awesome editor.
- Active installs
- 600,000+
- #101 of 1,000
- Downloads, all time
- 11.5M
- 11,482,090
- Downloads, 30 days
- 514.5K
- 46.8K in the last 7
- Rating
- 4.4 / 5
- 104 reviews
- Last updated
- 23 days ago
- Oct 8, 2026
- Version
- 3.54.3
- 83 releases
Upkeep and compatibility
| Last updated | October 8, 2026Updated in the last 3 months |
|---|---|
| Tested up to | WordPress 7.1.4Covers WordPress 7.1.4, the current release |
| Needs WordPress | 4.2 or newer |
| Needs PHP | 5.2.4 or newer |
| First published | December 7, 2015 |
| Support, last two months | 4 of 4 threads resolved (100%) |
Reviews
4.4 / 5 from 104 reviews
| 5 stars | 82 |
|---|---|
| 4 stars | 4 |
| 3 stars | 4 |
| 2 stars | 2 |
| 1 star | 12 |
Downloads, last 30 days
What the author says it does
Customize your WordPress site’s appearance by easily adding custom CSS and JS code without even having to modify your theme or plugin files. This is perfect for adding custom CSS tweaks to your site.
Features
- Text editor with syntax highlighting
- Print the code inline or included into an external file
- Print the code in the header or the footer
- Add CSS or JS to the frontend or the admin side
- Add as many codes as you want
- Keep your changes also when you change the theme
The opening of the plugin's own description. The full text, installation notes and changelog are on its WordPress.org page.
Questions the author answers
What if I want to add multiple external CSS codes?
If you write multiple codes of the same type (for example: two external CSS codes), then all of them will be printed one after another
Will this plugin affect the loading time?
When you click the Save button the codes will be cached in files, so there are no tedious database queries.
Does the plugin modify the code I write in the editor?
No, the code is printed exactly as in the editor. It is not modified/checked/validated in any way. You take the full responsability for what is written in there.
My code doesn’t show on the website
Try one of the following:
1. If you are using any caching plugin (like “W3 Total Cache” or “WP Fastest Cache”), then don’t forget to delete the cache before seing the code printed on the website.
2. Make sure the code is in Published state (not Draft or in Trash).
3. Check if the wp-content/uploads/custom-css-js folder exists and is writable
Does it work with a Multisite Network?
Yes.
What if I change the theme?
The CSS and JS are independent of the theme and they will persist through a theme change. This is particularly useful if you apply CSS and JS for modifying a plugin’s output.
Latest changelog entry
- 10/08/2026
- Fix: check for user capabilities on two AJAX handlers.
Screenshots
Manage Custom Codes 
Add/Edit Javascript 
Add/Edit CSS 
Add/Edit HTML
Tagged
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Where this page's numbers come from
Read from the WordPress.org plugin API on , when WordPress 7.1.4 was the current release. WordPress.org rounds active installs into buckets. These are the directory's figures, not my verdict, and I haven't tested this plugin.