{"id":4509,"date":"2025-10-21T23:25:49","date_gmt":"2025-10-21T21:25:49","guid":{"rendered":"https:\/\/tswanhosting.com\/learn\/?p=4509"},"modified":"2025-10-21T23:25:50","modified_gmt":"2025-10-21T21:25:50","slug":"comment-corriger-lerreur-404","status":"publish","type":"post","link":"https:\/\/tswanhosting.com\/learn\/web\/comment-corriger-lerreur-404\/","title":{"rendered":"Comment corriger l&rsquo;erreur 404"},"content":{"rendered":"<p>C&rsquo;est la page la plus c\u00e9l\u00e8bre et la plus frustrante du web : l&rsquo;erreur &quot;404 Not Found&quot;. Ce message signifie que votre navigateur a r\u00e9ussi \u00e0 communiquer avec le serveur du site, mais que la page sp\u00e9cifique que vous cherchiez n&rsquo;existe pas \u00e0 l&rsquo;adresse demand\u00e9e. C&rsquo;est un cul-de-sac num\u00e9rique. Pour un visiteur, c&rsquo;est une source d&rsquo;agacement qui m\u00e8ne souvent \u00e0 un d\u00e9part imm\u00e9diat du site. Pour un propri\u00e9taire de site, c&rsquo;est bien plus grave. En effet, une accumulation d&rsquo;erreurs 404 est un signal n\u00e9gatif pour les moteurs de recherche, indiquant un site mal entretenu. Cela gaspille votre &quot;budget de crawl&quot;, nuit \u00e0 l&rsquo;exp\u00e9rience utilisateur et peut entra\u00eener une perte de classement et de trafic. Par cons\u00e9quent, savoir comment identifier et corriger ces erreurs n&rsquo;est pas une simple t\u00e2che de maintenance ; c&rsquo;est un pilier fondamental de toute bonne strat\u00e9gie SEO.<\/p>\n<h2>Cause n\u00b01 : Le Probl\u00e8me de Permaliens (Quand tout le site est en 404)<\/h2>\n<p>C&rsquo;est le sc\u00e9nario le plus alarmant : vous cliquez sur les liens de votre propre menu, et toutes vos pages (sauf la page d&rsquo;accueil) renvoient une erreur 404. Ce probl\u00e8me survient souvent apr\u00e8s une migration de site ou une modification du serveur. Heureusement, la cause est presque toujours la m\u00eame, et la solution est incroyablement simple.<\/p>\n<p>Le probl\u00e8me vient du fait que le fichier <code>.htaccess<\/code> de WordPress, qui g\u00e8re la r\u00e9\u00e9criture des URL, est soit manquant, soit corrompu, soit incorrect. Pour le forcer \u00e0 se r\u00e9g\u00e9n\u00e9rer :<\/p>\n<ol>\n<li>Connectez-vous \u00e0 votre tableau de bord WordPress.<\/li>\n<li>Allez dans <strong>R\u00e9glages &gt; Permaliens<\/strong>.<\/li>\n<li>Ne modifiez absolument rien.<\/li>\n<li>Cliquez simplement sur le bouton <strong>&quot;Enregistrer les modifications&quot;<\/strong> en bas de la page.<\/li>\n<\/ol>\n<p>Cette simple action force WordPress \u00e0 r\u00e9\u00e9crire le fichier <code>.htaccess<\/code> avec les bonnes r\u00e8gles. Dans 99% des cas de 404 g\u00e9n\u00e9ralis\u00e9es, votre site sera instantan\u00e9ment r\u00e9par\u00e9.<\/p>\n<h2>Cause n\u00b02 : Les Liens Bris\u00e9s (Le cas par cas)<\/h2>\n<p>Le cas le plus courant est celui des erreurs 404 isol\u00e9es. Une page a \u00e9t\u00e9 supprim\u00e9e, son URL a \u00e9t\u00e9 modifi\u00e9e, ou un lien externe pointe vers une mauvaise adresse sur votre site. Votre mission est de trouver ces liens bris\u00e9s et de les r\u00e9parer.<\/p>\n<h3>\u00c9tape 1 : Identifier les erreurs 404<\/h3>\n<p>Votre meilleur alli\u00e9 pour cette t\u00e2che est la <strong>Google Search Console<\/strong>.<\/p>\n<ol>\n<li>Connectez-vous \u00e0 votre compte Google Search Console.<\/li>\n<li>Dans le menu de gauche, allez dans <strong>Index &gt; Pages<\/strong>.<\/li>\n<li>Dans le tableau, cherchez la section &quot;Non index\u00e9es&quot; et cliquez sur la raison <strong>&quot;Introuvable (404)&quot;<\/strong>.<\/li>\n<li>Google vous fournira une liste compl\u00e8te de toutes les URL de votre site qu&rsquo;il a tent\u00e9 d&rsquo;explorer mais qui ont renvoy\u00e9 une erreur 404.<\/li>\n<\/ol>\n<h3>\u00c9tape 2 : Corriger avec des redirections 301<\/h3>\n<p>Une fois que vous avez une URL qui g\u00e9n\u00e8re une erreur 404, vous ne devez pas la laisser telle quelle. Vous devez mettre en place une <strong>redirection 301<\/strong>. C&rsquo;est une instruction qui dit aux navigateurs et aux moteurs de recherche : &quot;Cette ancienne page a \u00e9t\u00e9 d\u00e9plac\u00e9e de fa\u00e7on permanente vers cette nouvelle adresse&quot;. Cela pr\u00e9serve l&rsquo;exp\u00e9rience utilisateur et, surtout, transf\u00e8re la valeur SEO de l&rsquo;ancien lien vers le nouveau.<\/p>\n<p>La m\u00e9thode la plus simple pour g\u00e9rer les redirections sur WordPress est d&rsquo;utiliser un plugin d\u00e9di\u00e9.<\/p>\n<ol>\n<li>Installez et activez le plugin <strong>&quot;Redirection&quot;<\/strong>.<\/li>\n<li>Allez dans <strong>Outils &gt; Redirection<\/strong>.<\/li>\n<li>Dans la section &quot;Ajouter une nouvelle redirection&quot;, remplissez les champs :\n<ul>\n<li><strong>URL source :<\/strong> Collez l&rsquo;ancienne URL qui cause l&rsquo;erreur 404 (par exemple, <code>\/mon-ancien-article<\/code>).<\/li>\n<li><strong>URL cible :<\/strong> Entrez la nouvelle URL valide et pertinente vers laquelle vous voulez rediriger (par exemple, <code>\/mon-nouvel-article-sur-le-sujet<\/code>).<\/li>\n<\/ul>\n<\/li>\n<li>Cliquez sur <strong>&quot;Ajouter une redirection&quot;<\/strong>.<\/li>\n<\/ol>\n<p>R\u00e9p\u00e9tez ce processus pour toutes les URL 404 importantes identifi\u00e9es dans la Search Console.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/tswanhosting.com\/learn\/wp-content\/uploads\/2025\/10\/illustration-corriger-erreur-404.png\" alt=\"Infographie montrant le processus : 1. Trouver une erreur 404 dans Google Search Console. 2. Utiliser le plugin &quot;Redirection&quot;. 3. Cr\u00e9er une redirection 301 de l&#039;ancienne URL vers la nouvelle.\" \/><\/p>\n<h2>Comment bien g\u00e9rer les redirections ?<\/h2>\n<ul>\n<li><strong>Redirigez toujours vers une page pertinente.<\/strong> Ne redirigez pas toutes vos erreurs 404 vers la page d&rsquo;accueil. C&rsquo;est consid\u00e9r\u00e9 comme une mauvaise pratique (un &quot;soft 404&quot;) par Google.<\/li>\n<li><strong>Si une page n&rsquo;a pas d&rsquo;\u00e9quivalent, que faire ?<\/strong> Si un vieil article n&rsquo;a plus lieu d&rsquo;\u00eatre et n&rsquo;a pas de rempla\u00e7ant, vous pouvez soit le laisser en 404 (il finira par \u00eatre d\u00e9sindex\u00e9), soit le rediriger vers la page de cat\u00e9gorie parente la plus pertinente.<\/li>\n<li><strong>Utilisez les outils de votre h\u00e9bergeur.<\/strong> Certains h\u00e9bergeurs performants comme <strong>Tswan Hosting<\/strong> int\u00e8grent des outils de gestion des redirections directement dans leur panneau de contr\u00f4le, ce qui peut \u00eatre une alternative efficace \u00e0 un plugin.<\/li>\n<\/ul>\n<p>En conclusion, la gestion des erreurs 404 est une t\u00e2che de maintenance SEO essentielle. En r\u00e9initialisant vos permaliens pour les probl\u00e8mes globaux et en utilisant m\u00e9thodiquement les redirections 301 pour les liens bris\u00e9s individuels, vous envoyez un signal fort de qualit\u00e9 \u00e0 Google et vous assurez que vos visiteurs trouvent toujours le contenu qu&rsquo;ils cherchent. C&rsquo;est une discipline que les agences web professionnelles, comme <a href=\"https:\/\/tswanhosting.com\/logiciels\">Tswan Softwares<\/a>, appliquent rigoureusement pour garantir la sant\u00e9 \u00e0 long terme des sites de leurs clients.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/tswanhosting.com\/learn\/wp-content\/uploads\/2025\/10\/cta-audit-seo-gratuit.png\" alt=\"Banni\u00e8re publicitaire pour un audit SEO gratuit par Tswan Hosting\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>C&rsquo;est la page la plus c\u00e9l\u00e8bre et la plus frustrante du web : l&rsquo;erreur &quot;404 Not Found&quot;. Ce message signifie que votre navigateur a r\u00e9ussi \u00e0 communiquer avec le serveur du site, mais que la page sp\u00e9cifique que vous cherchiez n&rsquo;existe pas \u00e0 l&rsquo;adresse demand\u00e9e. C&rsquo;est un cul-de-sac num\u00e9rique. Pour un visiteur, c&rsquo;est une source [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[113,134,58,1],"tags":[182,67,69,66,190],"class_list":{"0":"post-4509","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-performance-web","7":"category-seo","8":"category-serveur","9":"category-web","10":"tag-depannage-wordpress","11":"tag-hebergement-web","12":"tag-performance-web","13":"tag-tswan-hosting","14":"tag-tutoriel"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.1.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Comment corriger l&#039;erreur 404 - Tswan Learn<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/tswanhosting.com\/learn\/web\/comment-corriger-lerreur-404\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Comment corriger l&#039;erreur 404 - Tswan Learn\" \/>\n<meta property=\"og:description\" content=\"C&rsquo;est la page la plus c\u00e9l\u00e8bre et la plus frustrante du web : l&rsquo;erreur &quot;404 Not Found&quot;. 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