Grade B

Smart Custom 404 Error Page

Name: Smart Custom 404 Error Page
Rating: 4.9 (1195 reviews)
Author: NerdPress

⤓ Download v11.4.8 on WordPress.org ↗

by NerdPressupdated 2026-05-21🌿The Dependable Sort

Turn dead ends into helpful paths without breaking your SEO.

HealthyDeclining

88/100

The plugin creates custom error pages without using redirects.

Loved37/40

Trustworthy14/15

Fair & Honest15/15

Maintained18/18

Momentum4/12

✂️

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

Show the snippet

add_action( 'template_redirect', function () {
    if ( ! is_404() ) {
        return;
    }

    $custom_page_id = 42; // Replace with your 404 page ID.
    $post = get_post( $custom_page_id );

    if ( ! $post ) {
        return;
    }

    // Keep the 404 status code; do not redirect.
    status_header( 404 );
    nocache_headers();

    // Swap in the custom page and render it.
    global $wp_query;
    $wp_query->posts          = array( $post );
    $wp_query->post           = $post;
    $wp_query->post_count     = 1;
    $wp_query->found_posts    = 1;
    $wp_query->is_404         = false;
    $wp_query->is_page        = true;
    $wp_query->is_singular    = true;

    include get_template_directory() . '/page.php';
    exit;
} );

Keep in mind:The plugin also provides a settings UI, a Gutenberg block, and a shortcode for displaying the offending URL; those are not replicated here.

More plugins you can skip →

Active installs

~150,000

our estimate · wp.org shows 100k+

Rating

4.9★

1,195 ratings

Trend · vs a year ago

-22%

Declining

266 → 208 installs/day

What to watch out for

MINORreviews unevenly distributed over time

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

Declining · -22% in the last year

266/day a year ago→208/day today

Reviews

what people actually say

Smart Custom 404 Error Page is a well-regarded plugin valued for its simplicity and reliability, though at least one user reports it can break theme styling, specifically with Divi.

What people like

+Simple to set up and configure×5
+Does exactly what it promises — reliably serves a custom 404 page×6

Common complaints

−Can interfere with theme CSS, breaking styling — specifically reported with the Divi theme

Review trustMostly organic

4.89★Verified rating — holds steady vs the raw 4.90★
6%One-shot reviewers — most reviewers are active community members
past spikeReview timing — up to 26% of all reviews landed in a single month

Reviews per month · 5★ vs lower

2023-07-202025-01-102026-06-04

5★ reviews1–4★ reviews

All-time ratings · 1,195 total

5★

1,159

4★

3★

2★

1★

Latest reviews · 90 analyzed

2026-04-12★★★★★Great :)meeresschutz
2026-03-05★★★★★mooolt bo deadko
2025-12-17★★★★★Indispensabile ed Ottimo plugin bigportal
2025-09-02★★★★★Great plugin!Veru
2025-08-19★★★★★Gorgeous panon
2025-07-16★★★★★Not playing well with the Divi Theme Wingers574
2025-06-16★★★★★Top pour gérer ses 404 urbangames
2025-02-04★★★★★Works just fine!spectraemail
2024-12-04★★★★★Works Great!Frank DeBlasi
2024-10-07★★★★★Great plugin kkk07

Releases

recent versions from WordPress.org SVN

2026-05-21v11.4.8
2024-09-17v11.4.7
2024-04-17v11.4.6

Alternatives to Smart Custom 404 Error Page

Top Redirects plugins, ranked by score.

Redirection150k installs

Redirection2.5M installs

404 to 301150k installs

Attachment Pages Redirect25k installs

Safe Redirect Manager45k installs

301 Redirects350k installs

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.

208

Baseline · median of last 7 organic days

231

Prior 7-day baseline

160

Floor · 25th percentile over 14 days

290

Mean release-day peak (30d)

234

Latest day · 2026-06-03(organic)

-10.0%

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.

26%

Max month share · biggest single 30-day window

1.77

Distribution CV · <0.6 even, >1.5 bursty

97%

5★ share in analyzed sample

Solo reviewers · only this one wp.org activity

-25%

Volume velocity · last 6mo vs prior 6mo

4.90 → 4.89★

Sample avg · raw → solo-filtered