{"id":3201,"date":"2015-11-15T17:58:52","date_gmt":"2015-11-15T17:58:52","guid":{"rendered":"http:\/\/blog.fabianpiau.com\/?p=3201"},"modified":"2022-01-01T16:07:22","modified_gmt":"2022-01-01T16:07:22","slug":"the-best-free-and-online-tools-for-testing-and-optimizing-an-application-or-website","status":"publish","type":"post","link":"https:\/\/blog.fabianpiau.com\/fr\/2015\/11\/15\/the-best-free-and-online-tools-for-testing-and-optimizing-an-application-or-website\/","title":{"rendered":"Les meilleurs outils gratuits pour tester et optimiser une application ou un site web"},"content":{"rendered":"<p><a class=\"lang\" href=\"https:\/\/blog.fabianpiau.com\/en\/2015\/11\/15\/the-best-free-and-online-tools-for-testing-and-optimizing-an-application-or-website\/\" title=\"Read in english\"><strong class=\"labellang\"><span class=\"en\">&nbsp;<\/span>English version available<\/strong><\/a><\/p>\n<p>Voici quelques outils en ligne pour vous assurer que votre site web soit performant, ne contienne pas d&rsquo;erreurs et soit optimis\u00e9 pour le r\u00e9f\u00e9rencement. Ces trois caract\u00e9ristiques sont tr\u00e8s importantes car elles forment un cercle vertueux en se renforcant mutuellement. Aucune ne doit donc \u00eatre n\u00e9glig\u00e9e.<\/p>\n<p><br clear=\"none\" \/><\/p>\n<p class=\"right\" style=\"padding-left:15px;\"><a href=\"https:\/\/gtmetrix.com\/\" target=\"_blank\" title=\"GTMetrix\" rel=\"noopener\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" title=\"GTMetrix\" src=\"https:\/\/i0.wp.com\/blog.fabianpiau.com\/wp-content\/uploads\/post\/00082\/speedometer.png?resize=175%2C175&#038;ssl=1\" alt=\"GTMetrix\" width=\"175\" height=\"175\" \/><\/a><\/p>\n<h4>Performance<\/h4>\n<p>Apr\u00e8s avoir analys\u00e9 votre site, <a href=\"https:\/\/gtmetrix.com\/\" target=\"_blank\" title=\"GTMetrix\" rel=\"noopener\">GTMetrix<\/a> vous donnera de pr\u00e9cieux conseils pour am\u00e9liorer sa performance.<\/p>\n<ul>\n<li>Minimiser les ressources \u00e0 charger pour diminuer le nombre de requ\u00eates HTTP (utilisation de <a href=\"https:\/\/spritegen.website-performance.org\/\" target=\"_blank\" title=\"CSS sprites\" rel=\"noopener\">sprites<\/a>, fusion des fichiers)<\/li>\n<li>R\u00e9duire la taille de vos ressources. Il existe de tr\u00e8s bons compresseurs en ligne pour les <a href=\"https:\/\/tinypng.com\/\" target=\"_blank\" title=\"TinyPNG\" rel=\"noopener\">images (TinyPNG)<\/a>, les <a href=\"https:\/\/www.toptal.com\/developers\/cssminifier\/\" target=\"_blank\" title=\"CSS minifier\" rel=\"noopener\">fichiers CSS<\/a> et <a href=\"https:\/\/www.toptal.com\/developers\/javascript-minifier\/\" target=\"_blank\" title=\"JS minifier\" rel=\"noopener\">Javascript<\/a>.<\/li>\n<li>Sp\u00e9cifier les dimensions des images, le navigateur n&rsquo;a plus besoin de faire ce calcul<\/li>\n<li>Utiliser le cache du navigateur<\/li>\n<\/ul>\n<p><br clear=\"none\" \/><\/p>\n<p class=\"right\" style=\"padding-left:15px;\"><a href=\"https:\/\/seositecheckup.com\/\" target=\"_blank\" title=\"SEO SiteCheckup\" rel=\"noopener\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" title=\"SEO SiteCheckup\" src=\"https:\/\/i0.wp.com\/blog.fabianpiau.com\/wp-content\/uploads\/post\/00082\/seo.png?resize=500%2C208&#038;ssl=1\" alt=\"SEO SiteCheckup\" width=\"500\" height=\"208\" \/><\/a><\/p>\n<h4>R\u00e9f\u00e9rencement et SEO<\/h4>\n<p>Vous pouvez v\u00e9rifier votre r\u00e9f\u00e9rencement avec <a href=\"https:\/\/seositecheckup.com\/\" target=\"_blank\" title=\"SEO SiteCheckup\" rel=\"noopener\">SEO SiteCheckup<\/a>. Cet outil vous donnera de pr\u00e9cieuses informations afin d&rsquo;am\u00e9liorer la visibilit\u00e9 de votre site sur Internet.<\/p>\n<ul>\n<li>Utilisation des balises et attributs HTML standards (title, description, h1, h2, alt&#8230;)<\/li>\n<li>Pr\u00e9sence du plan du site (fichier sitemap)<\/li>\n<li>D\u00e9tection des liens cass\u00e9s<\/li>\n<li>D\u00e9tection de l&rsquo;activit\u00e9 sociale li\u00e9e \u00e0 votre site, votre pr\u00e9sence sur les r\u00e9seaux sociaux<\/li>\n<\/ul>\n<p><br clear=\"none\" \/><\/p>\n<p class=\"right\" style=\"padding-left:15px;\"><a href=\"https:\/\/www.w3.org\/developers\/tools\/\" target=\"_blank\" title=\"Outils W3C\" rel=\"noopener\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" title=\"Outils W3C\" src=\"https:\/\/i0.wp.com\/blog.fabianpiau.com\/wp-content\/uploads\/post\/00082\/analytics.png?resize=300%2C200&#038;ssl=1\" alt=\"Outils W3C\" width=\"300\" height=\"200\" \/><\/a><\/p>\n<h4>Validation technique<\/h4>\n<p>Vous devez aussi vous assurer que votre site est valide d&rsquo;un point de vue technique. Je vous conseille <a href=\"https:\/\/www.w3.org\/developers\/tools\/\" target=\"_blank\" title=\"Outils W3C\" rel=\"noopener\">les outils officiels fournis par le World Wide Web Consortium (W3C)<\/a>. Chaque outil est sp\u00e9cifique pour un usage particulier. Par exemple, vous trouverez un outil pour valider:<\/p>\n<ul>\n<li><a href=\"https:\/\/validator.w3.org\/\" target=\"_blank\" title=\"Validateur de fichiers HTML\" rel=\"noopener\">Les fichiers HTML<\/a><\/li>\n<li><a href=\"https:\/\/jigsaw.w3.org\/css-validator\/\" target=\"_blank\" title=\"Validateur de fichiers CSS\" rel=\"noopener\">Les fichiers CSS<\/a><\/li>\n<li><a href=\"https:\/\/validator.w3.org\/checklink\" target=\"_blank\" title=\"Validateur de liens\" rel=\"noopener\">Les liens<\/a><\/li>\n<li><a href=\"https:\/\/validator.w3.org\/feed\/\" target=\"_blank\" title=\"Validateur de flux RSS\" rel=\"noopener\">Votre flux RSS<\/a><\/li>\n<\/ul>\n<p>Il n&rsquo;est pas n\u00e9cessaire de valider chacune de vos pages, une par une. La validation de la page d&rsquo;accueil est en g\u00e9n\u00e9ral suffisante, les autres pages en d\u00e9coulant.<\/p>\n<p><br clear=\"none\" \/><\/p>\n<p class=\"right\" style=\"padding-left:15px;\"><a href=\"https:\/\/www.mail-tester.com\/\" target=\"_blank\" title=\"Mail tester\" rel=\"noopener\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" title=\"Mail tester\" src=\"https:\/\/i0.wp.com\/blog.fabianpiau.com\/wp-content\/uploads\/post\/00082\/email.png?resize=150%2C150&#038;ssl=1\" alt=\"Mail tester\" width=\"150\" height=\"150\" \/><\/a><\/p>\n<h4>Email<\/h4>\n<p>Votre application envoie des emails? Avec <a href=\"https:\/\/www.mail-tester.com\/\" target=\"_blank\" title=\"Mail tester\" rel=\"noopener\">Mail tester<\/a>, vous pouvez tester la pertinence et le format de vos emails. Cet outil vous permettra de savoir si votre courrier est consid\u00e9r\u00e9 comme ind\u00e9sirable par les clients de messagerie et vous donnera \u00e9galement des astuces pour \u00e9viter une telle situation.<\/p>\n<ul>\n<li>Le contenu doit s&rsquo;adapter \u00e0 la taille de l&rsquo;\u00e9cran (design responsive)<\/li>\n<li>Un format texte alternatif doit \u00eatre pr\u00e9sent pour les clients email qui ne peuvent lire du HTML<\/li>\n<li>La configuration de l&rsquo;authentification de vos emails doit \u00eatre valide (SPF, DKIM)<\/li>\n<\/ul>\n<p class=\"center\"><a href=\"https:\/\/www.w3.org\/developers\/tools\/\" target=\"_blank\" title=\"Outils W3C\" rel=\"noopener\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" title=\"Outils W3C\" src=\"https:\/\/i0.wp.com\/blog.fabianpiau.com\/wp-content\/uploads\/post\/00082\/responsive.png?resize=273%2C160&#038;ssl=1\" alt=\"Outils W3C\" width=\"273\" height=\"160\" \/><\/a><\/p>\n<p><br clear=\"none\" \/><\/p>\n<p>Pour vous donner une id\u00e9e des r\u00e9sultats de votre site par rapport aux autres, la plupart des outils \u00e9nonc\u00e9s dans l&rsquo;article vous attribueront une note, \u00e0 vous de jouer pour augmenter votre score!<\/p>","protected":false},"excerpt":{"rendered":"<p>&nbsp;English version available Voici quelques outils en ligne pour vous assurer que votre site web soit performant, ne contienne pas d&rsquo;erreurs et soit optimis\u00e9 pour le r\u00e9f\u00e9rencement. Ces trois caract\u00e9ristiques sont tr\u00e8s importantes car elles forment un cercle vertueux en se renforcant mutuellement. Aucune ne doit donc \u00eatre n\u00e9glig\u00e9e. Performance Apr\u00e8s avoir analys\u00e9 votre site, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3204,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":true,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[4],"tags":[213,274,260,276,275],"class_list":["post-3201","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technology","tag-cache","tag-online-tool","tag-performance","tag-seo","tag-web"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Les meilleurs outils gratuits pour tester et optimiser une application ou un site web | CarmaBlog<\/title>\n<meta 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