[{"data":1,"prerenderedAt":60},["ShallowReactive",2],{"\u002Fglossary\u002Fhtml-size":3,"\u002Fglossary\u002Fhtml-size:related":43},{"id":4,"title":5,"author":6,"authorImage":7,"body":8,"category":28,"date":29,"description":30,"draft":31,"extension":32,"letter":33,"meta":34,"navigation":35,"path":36,"readTime":37,"related":38,"seo":39,"stem":41,"term":5,"__hash__":42},"glossary\u002Fglossary\u002Fhtml-size.md","HTML Size","Fabian Krumbholz","\u002Fimages\u002Fauthors\u002Ffabian-krumbholz.webp",{"type":9,"value":10,"toc":24},"minimark",[11],[12,13,14,15,19,20,23],"p",{},"The amount of data (in bytes) that comprises the HTML document sent from the server to the browser. This includes the HTML markup but excludes CSS, JavaScript, images, and other resources. Understanding HTML size is important because a smaller HTML size can reduce the initial page load time. See also ",[16,17,18],"strong",{},"Core Web Vitals",", ",[16,21,22],{},"Time to Interactive (TTI)",".",{"title":25,"searchDepth":26,"depth":26,"links":27},"",2,[],null,"April 8, 2026","The amount of data (in bytes) that comprises the HTML document sent from the server to the browser. This includes the HTML markup but excludes CSS, JavaScript, images, and other resources.",false,"md","H",{},true,"\u002Fglossary\u002Fhtml-size","1 min read",[],{"title":40,"description":30},"HTML Size: Definition | Web Performance Glossary","glossary\u002Fhtml-size","34089dWKUWjlXFlV8vW7-OjztZa9DMMAqab-opRF4mY",[44,48,52,56],{"path":45,"title":46,"description":47,"letter":33},"\u002Fglossary\u002Fhar","HAR","A HAR (HTTP Archive format) file is a JSON-formatted log of a web browser's interaction with a site. It contains a detailed, timestamped record of every single network request and response, includi…",{"path":49,"title":50,"description":51,"letter":33},"\u002Fglossary\u002Fhtmlimageelementprototypesrc-setter","HTMLImageElement.prototype.src Setter","This is a sophisticated programming technique used by Speed Kit's algorithm to accurately measure the Largest Contentful Paint (LCP) on complex, JavaScript-heavy sites.",{"path":53,"title":54,"description":55,"letter":33},"\u002Fglossary\u002Fhttp2","HTTP\u002F2","HTTP\u002F2 is a major version of the HTTP protocol designed to make websites faster and more efficient. Its key feature is multiplexing, which allows a browser to download multiple resources (like CSS…",{"path":57,"title":58,"description":59,"letter":33},"\u002Fglossary\u002Fhttp3","HTTP\u002F3","HTTP\u002F3 is the latest version of the HTTP protocol, engineered for even greater performance, especially on unreliable networks. It is built on a new transport protocol called QUIC instead of TCP.",1787756714635]