Grade B

WP Add Custom CSS

Name: WP Add Custom CSS
Rating: 4.8 (90 reviews)
Author: Daniele De Santis

⤓ Download v1.2.1 on WordPress.org ↗

by Daniele De Santisupdated 2025-08-14😴The Napper

A lightweight CSS injector for those who need surgical styling precision.

HealthyGrowing

83/100

The plugin offers simple page styling but has a broken file output option.

Loved33/40

Trustworthy14/15

Fair & Honest15/15

Maintained9/18

Momentum12/12

✂️

You might not need this plugin. Its core job is small enough to live in your theme's functions.php.

Show the snippet

// --- Global custom CSS ---
add_action( 'wp_head', function () {
    $css = get_option( 'my_global_custom_css', '' );
    if ( $css ) {
        echo '<style id="my-global-custom-css">' . wp_strip_all_tags( $css ) . '</style>';
    }
} );

// --- Per-post/page custom CSS meta box ---
add_action( 'add_meta_boxes', function () {
    add_meta_box( 'my_custom_css', 'Custom CSS', function ( $post ) {
        $css = get_post_meta( $post->ID, '_custom_css', true );
        wp_nonce_field( 'my_custom_css_nonce', 'my_custom_css_nonce' );
        echo '<textarea name="my_custom_css" rows="8" style="width:100%;">' . esc_textarea( $css ) . '</textarea>';
    }, get_post_types( [ 'public' => true ] ), 'normal' );
} );

add_action( 'save_post', function ( $post_id ) {
    if (
        ! isset( $_POST['my_custom_css_nonce'] ) ||
        ! wp_verify_nonce( $_POST['my_custom_css_nonce'], 'my_custom_css_nonce' ) ||
        defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE
    ) return;
    update_post_meta( $post_id, '_custom_css', wp_strip_all_tags( $_POST['my_custom_css'] ?? '' ) );
} );

add_action( 'wp_head', function () {
    if ( ! is_singular() ) return;
    $css = get_post_meta( get_the_ID(), '_custom_css', true );
    if ( $css ) {
        echo '<style id="my-post-custom-css">' . wp_strip_all_tags( $css ) . '</style>';
    }
} );

Keep in mind:The plugin's settings page for managing global CSS and choosing the CSS output method is not replicated; global CSS must be set directly via the database or a wp-admin options page you build yourself.

More plugins you can skip →

Active installs

~65,000

our estimate · wp.org shows 60k+

→ on track for 70k+in ~2 weeks

Rating

4.8★

90 ratings

Trend · vs a year ago

+606%

Growing fast

17 → 120 installs/day

What to watch out for

MINORnot updated in 10 months

Downloads over time

real new installs per day · release spikes shown separately from the trend

2025-04-302025-08-082025-11-162026-02-232026-06-03

organicrelease spikerelease tailorganic trend · 14d rolling median

Growing fast · +606% in the last year

17/day a year ago→120/day today

Reviews

what people actually say

WP Add Custom CSS is a well-liked, lightweight plugin for adding page- or post-specific CSS in WordPress, though it carries a notable bug with its "Use a CSS file" output option and a minor UX friction around the Save button placement.

What people like

+Simple, focused functionality that does exactly what it advertises — adding custom CSS to specific pages or posts×5
+Useful for scoping CSS to specific pages or post types rather than loading it site-wide×2
+Works with WooCommerce and integrates with product pages×2
+Continues to work despite not being tested against the most recent WordPress versions

Common complaints

−The 'Use a CSS file' output option is broken — no CSS file is generated and styles have no effect on the frontend when this mode is selected
−Save button is positioned at the very bottom of the page, requiring repeated scrolling during frequent CSS edits
−Enabling a post type (e.g. Products) adds a custom CSS box to every individual post of that type, making it impractical for sites with large catalogs

Review trustMostly organic

4.80★Verified rating — holds steady vs the raw 4.80★
10%One-shot reviewers — most reviewers are active community members
past spikeReview timing — up to 40% of all reviews landed in a single month

Reviews per month · 5★ vs lower

2024-08-132025-07-092026-06-04

5★ reviews1–4★ reviews

All-time ratings · 90 total

5★

4★

3★

2★

1★

Latest reviews · 90 analyzed

2025-12-15★★★★★love it Jesko Bendmann
2025-11-22★★★★★It does exactly what it says in the tin danielepais
2025-11-08★★★★★Great plugin with a couple issues skylabb
2024-09-14★★★★★Still works great Hudson Atwell
2024-08-02★★★★★Still the best Rafał
2022-11-02★★★★★Grazie a Daniele!Andrea
2022-02-04★★★★★Did just what I needed macpuppy
2021-09-12★★★★★Awesome, please consider adding an option for product tags!KVNHNF
2021-03-24★★★★★Amazing joe6079
2021-01-24★★★★★very good damsanwp1-shot

Releases

recent versions from WordPress.org SVN

2025-08-14v1.2.1
2025-08-06v1.2.0
2022-09-26v1.1.6
2019-08-03v1.1.5
2019-01-20v1.1.4
2019-01-07v1.1.3
2018-03-01v1.1.2
2018-02-25v1.1.0

For developers & the curious

the raw signals behind the grade — none of this is on the friendly summary above

Download signals

Baselines are computed on organic days only — release spikes and their tails are excluded, so they're not inflated by the auto-update wave.

158

Baseline · median of last 7 organic days

100

Prior 7-day baseline

Floor · 25th percentile over 14 days

218

Mean release-day peak (30d)

129

Latest day · 2026-06-03(organic)

+58.0%

Week-over-week organic trend

Review signals

Concentration and drive-by metrics drive the review-burst and fake-review flags. 30–40% solo reviewers is normal; we only flag the extremes.

40%

Max month share · biggest single 30-day window

2.33

Distribution CV · <0.6 even, >1.5 bursty

91%

5★ share in analyzed sample

10%

Solo reviewers · only this one wp.org activity

—

Volume velocity · last 6mo vs prior 6mo

4.78 → 4.80★

Sample avg · raw → solo-filtered