4zero4
Turn "page not found" (404) errors into a helpful search instead of a dead end.
Use with caution
4zero4 works, but test it on a staging site before relying on it in 2026. Was last updated 4 months ago, and scores 49/100 on our health check.
- Small user base (<10 active installs)
- Very few reviews so far
How does it stack up?
Side-by-side on installs, updates, ratings & support
Daily downloads
Download spikes usually follow a new release — each site that auto-updates counts as a download.
Rankings
Where 4zero4 stands todayWordPress.org search rankings
Live position in the plugin search, top 100| Keyword | Position |
|---|---|
| 404 | >100 |
| error page | >100 |
| redirect | >100 |
| search | >100 |
About 4zero4
From the official readme · v1.2Description
4zero4 makes your 404 pages useful. When a visitor reaches a URL that no longer
exists, the plugin builds a search query from the requested address and redirects
the visitor to your site’s search results, so they land on relevant content
instead of an empty error page.
For example, a request for /my-old-product-name/ that no longer resolves is
turned into a search for “my old product name”.
Key points:
- Zero configuration. Activate it and it works.
- Temporary redirect (302). The original URL may become valid again, so the
redirect is never cached as permanently moved. - Front-end only. It never interferes with the admin area, feeds or the REST
API, and only acts on normal GET page views. - No external services. The plugin does not send any data anywhere and does
not use tracking or analytics.
Developer hooks
The behaviour can be customised with filters:
p4zero4_search_terms— change (or clear, to skip) the terms extracted from the URL.p4zero4_redirect_url— change (or clear, to cancel) the destination URL.p4zero4_redirect_status— change the HTTP status code (default302).
Installation
- Upload the
4zero4folder to/wp-content/plugins/, or install the plugin
from the Plugins screen in WordPress. - Activate the plugin through the “Plugins” menu in WordPress.
- That’s it — there are no settings. Any 404 will now redirect to a matching
site search.
Frequently asked questions
Does the plugin have a settings page?
No. It works out of the box with no configuration.
Why am I redirected with a 302 and not a 301?
A 404 is, by definition, temporary: the page might be restored later. A permanent 301 redirect would be cached by browsers and search engines and would be hard to undo. You can change the status code with the p4zero4_redirect_status filter.
Can I customise the search terms or the destination?
Yes. Use the p4zero4_search_terms, p4zero4_redirect_url and p4zero4_redirect_status filters described in the Description.
Does the plugin send any data to external services?
No. It performs a local redirect on your own site and contacts no third party.
Changelog
Recommended security and reliability update: safe input handling, temporary (302) redirects via wp_safe_redirect(), and new developer filters.
1.2
- Security: the requested URL is now read, unslashed and sanitised safely instead
of using a raw server variable. - Redirects now use
wp_safe_redirect()with a temporary 302 status instead of a
raw permanent 301 header. - Switched to the
template_redirecthook and added guards for admin, feeds, REST
and non-GET requests. - Added a guard against direct file access (ABSPATH check).
- Added the
p4zero4_search_terms,p4zero4_redirect_urland
p4zero4_redirect_status filters. - Completed the plugin header (License, Text Domain, Requires at least, Requires PHP).
- Rewrote the readme in English with full sections; fixed the Stable tag to match
the plugin version.
1.1
- Previous public release.
For developers
Is this your plugin? Show off the numbers.
Add a live badge to your site, docs or GitHub README. It updates on its own — no account needed.
Best 4zero4 alternatives
All 404 plugins →
FAQ
4zero4: quick answers
Straight answers, pulled from live WordPress.org data.
Live data from WordPress.org · checked Sep 29, 2026
Is 4zero4 free?
Yes. 4zero4 is free to download and use from the official WordPress.org plugin directory.
Is 4zero4 safe to use in 2026?
4zero4 works, but test it on a staging site before relying on it in 2026. Was last updated 4 months ago, and scores 49/100 on our health check.
How many websites use 4zero4?
4zero4 is active on <10 WordPress websites and has been downloaded 2,212 times since it launched in March 2019. It was downloaded 86 times in the last 30 days.
Does 4zero4 work with WordPress 7.1?
4zero4 is officially tested up to WordPress 7.0.6, while the latest release is 7.1.2. It may still work, but try it on a staging site first.
What PHP version does 4zero4 need?
4zero4 requires PHP 7.4 or higher. Most hosts run PHP 8.x today, so it works on any modern WordPress hosting.
When was 4zero4 last updated?
The latest version, 1.2, was released on June 4, 2026 (4 months ago).
Who makes 4zero4?
4zero4 is developed and maintained by Fabio Moro.
What are the best alternatives to 4zero4?
The most popular alternatives to 4zero4 are Redirection (2M+ installs), Broken Link Checker by AIOS… (300K+ installs) and Smart Custom 404 Error Page (100K+ installs).
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