{"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\/en\/2015\/11\/15\/the-best-free-and-online-tools-for-testing-and-optimizing-an-application-or-website\/","title":{"rendered":"The best free and online tools for testing and optimizing an application or website"},"content":{"rendered":"<p><a class=\"lang\" href=\"https:\/\/blog.fabianpiau.com\/fr\/2015\/11\/15\/the-best-free-and-online-tools-for-testing-and-optimizing-an-application-or-website\/\" title=\"Lire en fran\u00e7ais\"><strong class=\"labellang\"><span class=\"fr\">&nbsp;<\/span>Version fran\u00e7aise disponible<\/strong><\/a><\/p>\n<p>In this article, I will give you some useful online tools to ensure your website is efficient, does not contain errors and is optimized for search engines (SEO). These three characteristics are very important because they form a virtuous circle by mutually reinforcing each other. None should be overlooked.<\/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>After analyzing your website, <a href=\"https:\/\/gtmetrix.com\/\" target=\"_blank\" title=\"GTMetrix\" rel=\"noopener\">GTMetrix<\/a> will give you valuable tips to improve its performance.<\/p>\n<ul>\n<li>Minimize the amount of resource to reduce the number of HTTP requests (using <a href=\"https:\/\/spritegen.website-performance.org\/\" target=\"_blank\" title=\"CSS sprites\" rel=\"noopener\">sprites<\/a>, merging files)<\/li>\n<li>Reduce the size of your resources. There are very good online compressors for <a href=\"https:\/\/tinypng.com\/\" target=\"_blank\" title=\"TinyPNG\" rel=\"noopener\">images (TinyPNG)<\/a>, <a href=\"https:\/\/www.toptal.com\/developers\/cssminifier\/\" target=\"_blank\" title=\"CSS minifier\" rel=\"noopener\">CSS<\/a> and <a href=\"https:\/\/www.toptal.com\/developers\/javascript-minifier\/\" target=\"_blank\" title=\"JS minifier\" rel=\"noopener\">Javascript files<\/a>.<\/li>\n<li>Specify image dimensions, the browser does not need to do this calculation<\/li>\n<li>Use the browser cache<\/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>Search Engine Optimization &#8211; SEO<\/h4>\n<p>You can check your ranking with <a href=\"https:\/\/seositecheckup.com\/\" target=\"_blank\" title=\"SEO SiteCheckup\" rel=\"noopener\">SEO SiteCheckup<\/a>. This tool will give you valuable information to improve your site&#8217;s visibility on the Internet.<\/p>\n<ul>\n<li>Using the basic HTML tags and attributes (title, description, h1, h2, alt&#8230;)<\/li>\n<li>Creation of the sitemap file<\/li>\n<li>Detection of broken links<\/li>\n<li>Detection of the social activity linked to your website, your presence on social networks<\/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>Technical validators<\/h4>\n<p>You should also make sure your site is valid from a technical point of view. I recommend the <a href=\"https:\/\/www.w3.org\/developers\/tools\/\" target=\"_blank\" title=\"W3C developer tools\" rel=\"noopener\">official developer tools provided by the World Wide Web Consortium (W3C)<\/a>. Each tool is specific for a particular purpose. For example, you will find a tool to validate:<\/p>\n<ul>\n<li><a target=\"_blank\" href=\"https:\/\/validator.w3.org\/\" title=\"HTML validator\" rel=\"noopener\">HTML files<\/a><\/li>\n<li><a target=\"_blank\" href=\"https:\/\/jigsaw.w3.org\/css-validator\/\" title=\"CSS validator\" rel=\"noopener\">CSS files<\/a><\/li>\n<li><a target=\"_blank\" href=\"https:\/\/validator.w3.org\/checklink\" title=\"Link checker\" rel=\"noopener\">Links<\/a><\/li>\n<li><a target=\"_blank\" href=\"https:\/\/validator.w3.org\/feed\/\" title=\"RSS validator\" rel=\"noopener\">RSS newsfeed<\/a><\/li>\n<\/ul>\n<p>It is not necessary to validate every page one by one. The validation of the homepage is usually sufficient.<\/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>Your application is sending emails? With <a href=\"https:\/\/www.mail-tester.com\/\" target=\"_blank\" title=\"Mail tester\" rel=\"noopener\">Mail tester<\/a>, you can test the relevance and format of your emails. This tool will let you know if the emails you are currently sending are considered as spam and also give you advice to avoid such a situation.<\/p>\n<ul>\n<li>The content should adapt to the size of the screen (responsive design)<\/li>\n<li>An alternative raw text format should be attached for email clients that cannot render HTML<\/li>\n<li>The authentication of your emails should be properly configured (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>To give you an idea of your site&#8217;s performance compare to others, most of the tools quoted in this article will give you a score, now you have to increase it!<br \/>\n<\/p>","protected":false},"excerpt":{"rendered":"<p>&nbsp;Version fran\u00e7aise disponible In this article, I will give you some useful online tools to ensure your website is efficient, does not contain errors and is optimized for search engines (SEO). These three characteristics are very important because they form a virtuous circle by mutually reinforcing each other. None should be overlooked. Performance After analyzing [&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>The best free and online tools for testing and optimizing an application or website | CarmaBlog<\/title>\n<meta name=\"description\" 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