Smart Custom 404 Error Page vs 404 Solution

Stop losing visitors and search rankings to broken links. 404 Solution automatically redirects 404s to the right page — not just your homepage — using a 7-engine matching pipeline that includes a spell-checking algorithm to find what visitors actually typed. Example: A visitor hits /prodcut/awesome-item (typo). Most 404 redirect plugins send them to your homepage. 404 Solution’s spell-checker finds /product/awesome-item and redirects them there automatically. Why 404 Solution Is Different Most redirect plugins fall into two categories: tools that require you to manually write every rule, or tools that blindly send every 404 to your homepage. 404 Solution does neither. A spell-checking algorithm that actually matches typos. Using Levenshtein distance and N-gram scoring, 404 Solution catches /prodcut/, /categroy/, and /wooocmmerce/ and finds the real destination — something no other free plugin does. 7 matching engines, in sequence. Slug match → URL fix → Title keywords → Category/tag paths → Content search → Spelling similarity → Archive fallback. The first engine with a confident match wins. Automatic, from day one. Install and activate. 404 Solution starts capturing and redirecting immediately. You can tune it; you don’t have to. Redirect management when you need it. Full manual redirect editor, regex support, bulk actions, and CSV/JSON import compatible with Redirection’s export format. Debug mode that shows its work. Enable debug logging and see exactly which engine chose a redirect and why — a level of transparency no competing plugin offers. Built for real-world hosting. Self-healing database tables, auto-recovery from corruption, automatic log trimming, and zero wp-admin-wide banners. Ships with extras most plugins sell separately. HTTP 410 Gone, 307/308/451 status codes, Google Search Console integration, REST API, WP-CLI support, email digest reports, and security probe detection — all free. Unlike plugins that blindly redirect to your homepage A 404-to-homepage redirect tells Google your broken URL is the same page as your homepage. That creates a soft 404 — a page Google may index as duplicate content, eroding crawl budget and ranking over time. 404 Solution redirects to the correct destination, or returns a proper 410 Gone when content is permanently removed. Both outcomes are better for search engines and for visitors. How It Works A visitor reaches a URL that returns a 404. 404 Solution runs the URL through its 7-engine pipeline. Each engine tries to find a confident match above its score threshold. The first engine to find a match wins. The visitor is redirected to the correct page. The redirect is logged. You can review, edit, or delete it from the dashboard. The whole process adds no perceptible latency for visitors on non-404 pages. The matching pipeline only runs when a genuine 404 occurs. Key Features Intelligent Automatic Matching 7-engine matching pipeline (slug, URL fix, title, category/tag, content, spelling, archive) Levenshtein distance + N-gram scoring catches genuine typos Per-engine confidence thresholds — tune aggressiveness per engine Conditional engine groups — override the matching strategy for specific URL patterns Slug-change auto-detection — redirects created automatically when you rename a post Trash/deletion monitoring — redirect created automatically when a post is deleted Redirect Management Manual redirect editor with bulk actions Full regular expression support CSV and JSON import/export (compatible with Redirection plugin format) .htaccess and Nginx server-level export Per-post and per-term exclusion via meta box HTTP status codes: 301, 302, 307 (method-preserving temporary), 308 (method-preserving permanent), 410 Gone, 451 Unavailable For Legal Reasons, and Meta Refresh GDPR-compliant: IP addresses are hashed before storage — never written to disk in plain text 404 Monitoring and Logging Captures every 404 hit with referrer, user agent, and timestamp Automatic log trimming with configurable disk usage limits Security monitoring — flags vulnerability scanner probes (.env, /wp-config.php, phpMyAdmin, etc.) Reporting and Diagnostics Stats dashboard with traffic trend charts (404s, redirects, captures over time) Email digest reports Debug logging — see which engine fired and why Google Search Console integration — import crawl errors and push fixes Internal link scanner to find broken links before visitors do Developer and Integrator Tools REST API for redirect management WP-CLI subcommands (list, create, delete, import, export) Scheduled maintenance cron Full WordPress Multisite support Compatibility WooCommerce (products, variations, categories, custom URLs) Yoast SEO, Rank Math WPML, Polylang, TranslatePress Easy Digital Downloads All custom post types and custom taxonomies Perfect For eCommerce sites (WooCommerce, EDD) with changing product URLs Content sites with evolving permalink structures Migrated sites where old URLs need to map to new content Large sites with thousands of pages where manual redirects are impractical

Bringing visitors to your website takes time and effort. Every visitor is important. The default 404 error page of most themes does not provide any information on what to find on your site. A first-time visitor, who does not know you, is left in a dead end and leaves your website. Set up a helpful custom 404 error page to keep them on your site! This handy plugin allows you to easily create your own 404 error page without any effort and it works with almost every theme. Out of Retirement! NerdPress has adopted Smart Custom 404 Page! Read the announcement here. We’ve been fans of this plugin for many years, and we’re grateful for Peter’s many years of service to the community. Peter retired from plugin development in October 2023, so we’ve jumped in to help ensure this plugin continues to work well now and in the future. Usage Create your custom 404 error page just like any other page using the WordPress Editor (Pages > Add New). Then go to Appearance > 404 Error Page and select the created page as your custom 404 error page. That’s it! Why use this plugin? Unlike similar plugins the 404page plugin does not create redirects. That’s quite important because a correct code 404 is delivered which tells search engines that the page does not exist and has to be removed from the index. Additionally, the 404page plugin does not create additional server requests. Requirements The only requirement for this plugin is that you change the Permalink Structure in Settings > Permalinks to anything else but “Plain.” This also activates the WordPress 404 error handling. Block & Shortcode Block The Plugin offers a block “URL causing 404 error” for the block-based editor to show the URL that caused the error. The block offers three display options: “Page” to show the page including path ( e.g. does/not/exist ) “Domain Path” to show the URL without protocol and parameters ( e.g. example.com/does/not/exist ) “Full” to show the complete URL ( e.g. https://example.com/does/not/exist?p=1 ) Shortcode The Plugin offers a shortcode “pp_404_url” for the classic editor to show the URL that caused the error. There are three possible options: [pp_404_url page] to show the page including path ( e.g. does/not/exist ) [pp_404_url domainpath] to show the URL without protocol and parameters ( e.g. example.com/does/not/exist ) [pp_404_url] or [pp_404_url full] to show the complete URL ( e.g. https://example.com/does/not/exist?p=1 ) Plugin Privacy Information This plugin does not set cookies This plugin does not collect or store any data This plugin does not send any data to external servers For developers Action Hook The plugin adds an action hook 404page_after_404 which you can use to add extra functionality. The exact position the action occurs after an 404 error is detected depends on the Operating Method. Your function must not generate any output. There are no parameters. Constant If the 404page plugin is installed and activated it defines the PHP constant PP_404. Check existence of it to detect the 404page plugin. Functions The Plugin provides the following functions: pp_404_is_active() to check if there is a custom 404 page selected and the selected page exists pp_404_get_page_id() to get the ID of the 404 page pp_404_get_all_page_ids() to get an array of page IDs in all languages pp_404_get_the_url( $type ) to get the URL that caused the 404 error Parameter $type string Optional “page” to get the page including path ( e.g. does/not/exist ) “domainpath” to get the URL without protocol and parameters ( e.g. example.com/does/not/exist ) “full” (default) to get the complete URL ( e.g. https://example.com/does/not/exist?p=1 ) Native Mode If you are a theme developer you can add native support for the 404page plugin to your theme for full control.