CSS Url Argument
Adds custom css file to header if specific url argument is present with a parameter.
Consider an alternative
CSS Url Argument shows warning signs in 2026 — compare the alternatives below before installing. Was last updated 8 years ago, and scores 21/100 on our health check.
- Small user base (<10 active installs)
- Very few reviews so far
- No update in 8 years
- Only tested up to WordPress 4.9 (latest is 7.1)
Daily downloads
Download spikes usually follow a new release — each site that auto-updates counts as a download.
Rankings
Where CSS Url Argument stands todayWordPress.org search rankings
Live position in the plugin search, top 100| Keyword | Position |
|---|---|
| argument | >100 |
| css | >100 |
| custom | >100 |
| parameter | >100 |
| url | >100 |
About CSS Url Argument
From the official readme · v1.1Description
Adds custom css file to header if specific url argument is present with a parameter.
For example:
* you want to change the site title color without changing the theme or lossing the changes on update.
This plugin let’s you add custom css files and either use them on load or on input of a custom parameter after the theme argument.
By using the plugin css (located /wp-content/plugins/css_url_argument/scripts/css/ directory) or
use a custom css file (located /wp-content/plugins/css_url_argument/custom_css/{your css file} directory) with a parameter.
Use this plugin by adding ?theme={your css file name without .css} to load custom css on parse of a parameter to the site.
Arbitrary section
A brief Markdown Example
Ordered list:
- Loads custom css when custom url parameter is present.
Installation
This section describes how to install the plugin and get it working.
e.g.
- Upload the plugin files to the
/wp-content/plugins/css_url_argumentdirectory, or install the plugin through the WordPress plugins screen directly. - Activate the plugin through the ‘Plugins’ screen in WordPress.
- Upload Custom css file to
/wp-content/plugins/css_url_argument/custom_css/directory. - Go to your domain url and add
?theme={your css file name}
Changelog
Upgrade notice: It's stable.
1.1
- Changed; Cleaned up scripts
- Changed; ShortCode runs from js.
- Added; Example css file(s) yellow and purple.
- Added; Basic Admin Page.
- Added; Basic How To Admin SubPage.
- Added; Script to automatically load css on url parameter.
- Added; Plugin Css to automatically change anything needed like shortcode hide.
- Added; Shortcode [CSS_UP]
Screenshots
For developers
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FAQ
CSS Url Argument: quick answers
Straight answers, pulled from live WordPress.org data.
Live data from WordPress.org · checked Oct 10, 2026
Is CSS Url Argument free?
Yes. CSS Url Argument is free to download and use from the official WordPress.org plugin directory.
Is CSS Url Argument safe to use in 2026?
CSS Url Argument shows warning signs in 2026 — compare the alternatives below before installing. Was last updated 8 years ago, and scores 21/100 on our health check.
How many websites use CSS Url Argument?
CSS Url Argument is active on <10 WordPress websites and has been downloaded 1,498 times since it launched in September 2018. It was downloaded 63 times in the last 30 days.
Does CSS Url Argument work with WordPress 7.1?
CSS Url Argument is officially tested up to WordPress 4.9.34, while the latest release is 7.1.3. It may still work, but try it on a staging site first.
What PHP version does CSS Url Argument need?
CSS Url Argument requires PHP 5.2.4 or higher. Most hosts run PHP 8.x today, so it works on any modern WordPress hosting.
When was CSS Url Argument last updated?
The latest version, 1.1, was released on September 9, 2018 (8 years ago).
Who makes CSS Url Argument?
CSS Url Argument is developed and maintained by cema.
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