{"id":47182,"date":"2026-10-26T09:10:00","date_gmt":"2026-10-26T07:10:00","guid":{"rendered":"https:\/\/www.yoannuzan.com\/?p=47182"},"modified":"2026-10-26T10:28:14","modified_gmt":"2026-10-26T08:28:14","slug":"url-tirets-underscores-google","status":"publish","type":"post","link":"https:\/\/www.yoannuzan.com\/url-tirets-underscores-google\/","title":{"rendered":"Tirets ou underscores dans les URL : Google tranche"},"content":{"rendered":"\n\n<div class=\"kk-star-ratings kksr-auto kksr-align-left kksr-valign-top\"\n    data-payload='{&quot;align&quot;:&quot;left&quot;,&quot;id&quot;:&quot;47182&quot;,&quot;slug&quot;:&quot;default&quot;,&quot;valign&quot;:&quot;top&quot;,&quot;ignore&quot;:&quot;&quot;,&quot;reference&quot;:&quot;auto&quot;,&quot;class&quot;:&quot;&quot;,&quot;count&quot;:&quot;1&quot;,&quot;legendonly&quot;:&quot;&quot;,&quot;readonly&quot;:&quot;&quot;,&quot;score&quot;:&quot;5&quot;,&quot;starsonly&quot;:&quot;&quot;,&quot;best&quot;:&quot;5&quot;,&quot;gap&quot;:&quot;5&quot;,&quot;greet&quot;:&quot;Notez cet article&quot;,&quot;legend&quot;:&quot;5\\\/5 - (1 vote)&quot;,&quot;size&quot;:&quot;24&quot;,&quot;title&quot;:&quot;Tirets ou underscores dans les URL : Google tranche&quot;,&quot;width&quot;:&quot;142.5&quot;,&quot;_legend&quot;:&quot;{score}\\\/{best} - ({count} {votes})&quot;,&quot;font_factor&quot;:&quot;1.25&quot;}'>\n            \n<div class=\"kksr-stars\">\n    \n<div class=\"kksr-stars-inactive\">\n            <div class=\"kksr-star\" data-star=\"1\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"2\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"3\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"4\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"5\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n    \n<div class=\"kksr-stars-active\" style=\"width: 142.5px;\">\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n<\/div>\n                \n\n<div class=\"kksr-legend\" style=\"font-size: 19.2px;\">\n            5\/5 - (1 vote)    <\/div>\n    <\/div>\n<p>C&rsquo;est une question que l&rsquo;on me pose souvent lors d&rsquo;une refonte : faut-il des tirets ou des underscores dans les URL ? Google vient de clarifier sa r\u00e9ponse. Google Search Central a mis \u00e0 jour sa documentation sur la <a href=\"https:\/\/developers.google.com\/search\/docs\/crawling-indexing\/url-structure?hl=fr\" target=\"_blank\" rel=\"noopener\">structure des URL<\/a>, une modification signal\u00e9e dans son journal des mises \u00e0 jour du 23 octobre 2026, en accompagnement d&rsquo;un \u00e9pisode de sa s\u00e9rie vid\u00e9o \u00ab The Non-Canonical Cabinet \u00bb consacr\u00e9 aux URL.<\/p>\n<p>La r\u00e9ponse est claire : des tirets. Mais la vraie question, pour un site existant, est ailleurs : faut-il renommer ses anciennes URL ?<\/p>\n<h2>Que dit exactement Google sur les tirets et les underscores ?<\/h2>\n<p>La documentation recommande de s\u00e9parer les mots dans les URL, et plus pr\u00e9cis\u00e9ment d&rsquo;utiliser des traits d&rsquo;union (-) plut\u00f4t que des traits de soulignement (_). Google donne l&rsquo;explication : l&rsquo;underscore est historiquement utilis\u00e9 pour regrouper des concepts qui doivent rester ensemble, par exemple dans les noms de fonctions en programmation (format_date), alors que le tiret marque clairement la limite entre deux mots.<\/p>\n<p>Google donne trois exemples :<\/p>\n<ul>\n<li>conseill\u00e9 : \/summer-clothing\/filter?color-profile=dark-grey,<\/li>\n<li>d\u00e9conseill\u00e9 : \/summer_clothing\/filter?color_profile=dark_grey,<\/li>\n<li>d\u00e9conseill\u00e9 aussi : \/greendress, avec les mots coll\u00e9s.<\/li>\n<\/ul>\n<p>Ce n&rsquo;est pas une nouveaut\u00e9 absolue, Google recommande les tirets depuis des ann\u00e9es. La mise \u00e0 jour pr\u00e9cise surtout le raisonnement, et la vid\u00e9o associ\u00e9e <a href=\"https:\/\/www.youtube.com\/watch?v=Mfvw43BbHy0\" target=\"_blank\" rel=\"noopener\">What can you actually put in a URL?<\/a> le r\u00e9sume bien.<\/p>\n<figure id=\"attachment_47179\" aria-describedby=\"caption-attachment-47179\" style=\"width: 1334px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-47179\" src=\"\/file\/2026\/10\/url-tirets-underscores-yoann-uzan.jpg\" alt=\"Deux barres d'adresse compar\u00e9es : mots s\u00e9par\u00e9s par des tirets d'un c\u00f4t\u00e9, par des underscores de l'autre\" width=\"1344\" height=\"752\" srcset=\"https:\/\/www.yoannuzan.com\/inc\/uploads\/2026\/10\/url-tirets-underscores-yoann-uzan.jpg 1344w, https:\/\/www.yoannuzan.com\/inc\/uploads\/2026\/10\/url-tirets-underscores-yoann-uzan-300x168.jpg 300w, https:\/\/www.yoannuzan.com\/inc\/uploads\/2026\/10\/url-tirets-underscores-yoann-uzan-1024x573.jpg 1024w, https:\/\/www.yoannuzan.com\/inc\/uploads\/2026\/10\/url-tirets-underscores-yoann-uzan-768x430.jpg 768w\" sizes=\"auto, (max-width: 1344px) 100vw, 1344px\" \/><figcaption id=\"caption-attachment-47179\" class=\"wp-caption-text\">Google recommande les tirets pour s\u00e9parer les mots dans les URL.<\/figcaption><\/figure>\n<h2>Faut-il renommer ses anciennes URL ?<\/h2>\n<p>Dans la grande majorit\u00e9 des cas, non. Changer une URL qui se positionne, c&rsquo;est prendre un risque pour un gain tr\u00e8s faible :<\/p>\n<ul>\n<li>il faut une <a href=\"\/redirections-301-htaccess\/\">redirection 301<\/a> pour chaque ancienne URL,<\/li>\n<li>Google doit r\u00e9explorer et r\u00e9indexer les pages, ce qui cr\u00e9e souvent une baisse temporaire,<\/li>\n<li>les liens externes pointent toujours vers l&rsquo;ancienne adresse et passent par la redirection,<\/li>\n<li>une erreur dans les redirections peut faire perdre des positions durablement.<\/li>\n<\/ul>\n<p><strong>Une URL avec des underscores qui se positionne bien vaut mieux qu&rsquo;une URL parfaite qui repart de z\u00e9ro.<\/strong><\/p>\n<p>En revanche, appliquez la r\u00e8gle \u00e0 tous les nouveaux contenus. Et si vous pr\u00e9parez une refonte o\u00f9 les URL changent de toute fa\u00e7on, profitez-en pour passer aux tirets. Je d\u00e9taille la m\u00e9thode dans mon article sur le <a href=\"\/seo-refonte-migration\/\">SEO pendant une refonte<\/a>.<\/p>\n<p>Exemple : une boutique dont les fiches produits sont en \/produit\/canape_oslo_vert ne doit pas tout renommer demain. Mais les nouvelles fiches peuvent sortir en \/produit\/canape-oslo-vert, et la prochaine migration de CMS sera le bon moment pour harmoniser.<\/p>\n<h2>Quelles autres r\u00e8gles d&rsquo;URL rappelle Google ?<\/h2>\n<p>La page mise \u00e0 jour contient d&rsquo;autres points utiles, surtout pour les sites e-commerce :<\/p>\n<ul>\n<li>les URL sont sensibles \u00e0 la casse : \/Canape et \/canape sont deux URL diff\u00e9rentes pour Google,<\/li>\n<li>pour les param\u00e8tres, il faut utiliser = et &amp;, et une virgule pour plusieurs valeurs d&rsquo;un m\u00eame filtre,<\/li>\n<li>les fragments (#) ne doivent pas servir \u00e0 changer le contenu d&rsquo;une page,<\/li>\n<li>les filtres combinables d&rsquo;un catalogue peuvent cr\u00e9er un nombre \u00e9norme d&rsquo;URL et gaspiller le <a href=\"\/google-budget-crawl-exploration\/\">budget d&rsquo;exploration<\/a>,<\/li>\n<li>il vaut mieux utiliser des liens relatifs \u00e0 la racine (\/categorie\/page\/) que des liens relatifs au dossier parent (..\/..\/page\/), qui peuvent g\u00e9n\u00e9rer des URL fant\u00f4mes.<\/li>\n<\/ul>\n<p>Un d\u00e9tail amusant pour finir : la version fran\u00e7aise de la page, traduite automatiquement, contient une erreur. Pour les sites multir\u00e9gionaux, la version anglaise pr\u00e9sente le sous-r\u00e9pertoire par pays (example.com\/de\/) comme une approche recommand\u00e9e, alors que la version fran\u00e7aise l&rsquo;indique comme \u00ab d\u00e9conseill\u00e9e \u00bb. En cas de doute, fiez-vous toujours \u00e0 la version anglaise des documentations Google.<\/p>\n<h2>Mon avis<\/h2>\n<p>Je trouve cette clarification utile, parce qu&rsquo;elle met fin \u00e0 un d\u00e9bat qui revient \u00e0 chaque refonte. Mais il ne faut pas en faire une priorit\u00e9 SEO. Le choix entre tiret et underscore p\u00e8se tr\u00e8s peu \u00e0 c\u00f4t\u00e9 du contenu, de la structure du site ou des liens internes.<\/p>\n<p>Selon moi, le passage le plus important de cette page concerne les filtres et les param\u00e8tres. Sur un site e-commerce, c&rsquo;est l\u00e0 que se cachent les vrais probl\u00e8mes d&rsquo;exploration, bien plus que dans les underscores.<\/p>\n<h2>Mon retour d&rsquo;exp\u00e9rience<\/h2>\n<p>Lors des audits, je vois r\u00e9guli\u00e8rement des sites qui ont renomm\u00e9 leurs URL \u00ab pour le SEO \u00bb et perdu une partie de leur trafic pendant des mois, \u00e0 cause de redirections incompl\u00e8tes. \u00c0 l&rsquo;inverse, je n&rsquo;ai jamais vu un site d\u00e9coller uniquement parce qu&rsquo;il \u00e9tait pass\u00e9 des underscores aux tirets.<\/p>\n<p>Ma r\u00e8gle est simple : on ne touche pas aux URL qui fonctionnent, et on fait les choses proprement pour les nouvelles. Si vous h\u00e9sitez sur une refonte ou une migration, c&rsquo;est un point que je v\u00e9rifie en tant que <a href=\"\/referencement-seo\/freelance-seo\/\">freelance SEO<\/a>.<\/p>\n<h2>FAQ : tirets et underscores dans les URL<\/h2>\n<h3>Google p\u00e9nalise-t-il les URL avec des underscores ?<\/h3>\n<p>Non, il n&rsquo;y a pas de p\u00e9nalit\u00e9. Google recommande simplement les tirets, qui l&rsquo;aident \u00e0 mieux identifier les mots dans l&rsquo;URL.<\/p>\n<h3>Faut-il rediriger ses URL avec underscores vers des URL avec tirets ?<\/h3>\n<p>Seulement si vous avez une autre raison de changer les URL, comme une refonte. Sinon, le risque li\u00e9 aux redirections d\u00e9passe le gain attendu.<\/p>\n<h3>Les majuscules dans les URL posent-elles probl\u00e8me ?<\/h3>\n<p>Google traite \/Page et \/page comme deux URL diff\u00e9rentes. Il vaut mieux tout \u00e9crire en minuscules pour \u00e9viter les doublons.<\/p>\n<h3>Peut-on mettre des accents dans une URL ?<\/h3>\n<p>Google accepte les caract\u00e8res non ASCII s&rsquo;ils sont encod\u00e9s en pourcentage. Pour un site fran\u00e7ais, je conseille quand m\u00eame des URL sans accents, plus simples \u00e0 partager et \u00e0 copier.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>C&rsquo;est une question que l&rsquo;on me pose souvent lors d&rsquo;une refonte : faut-il des tirets ou des underscores dans les URL ? Google vient de clarifier sa r\u00e9ponse. Google Search Central a mis \u00e0 jour sa documentation sur la structure des URL, une modification signal\u00e9e dans son journal des mises \u00e0 jour du 23 octobre &#8230; <a title=\"Tirets ou underscores dans les URL : Google tranche\" class=\"read-more\" href=\"https:\/\/www.yoannuzan.com\/url-tirets-underscores-google\/\" aria-label=\"En savoir plus sur Tirets ou underscores dans les URL : Google tranche\">Lire plus<\/a><\/p>\n","protected":false},"author":1,"featured_media":47178,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-47182","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-seo"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Tirets ou underscores dans les URL : Google tranche<\/title>\n<meta name=\"description\" content=\"Tirets ou underscores dans les URL ? 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