Learn HTML

Learn what HTML is, why it matters, how it fits the web, its key features, common myths, and the best next steps for beginners.

Learn what HTML is, how it structures web pages, where it fits in web development, and why semantic HTML5 matters for accessibility and SEO.

Learn how to set up a simple HTML environment, choose an editor, verify your tools, fix common issues, and start building web pages.

Learn HTML basic syntax, including tags, attributes, nesting, comments, and semantic structure, with clear examples and common mistakes.

Learn how to build your first HTML page with semantic tags, metadata, headings, links, images, and accessible page structure.

Learn what the HTML doctype is, how it affects browser rendering, and how HTML versions evolved from HTML4 to HTML5.

Learn what the HTML head and body do, what belongs in each one, how they work together, and common mistakes to avoid.

Learn how HTML metadata works, including meta, charset, and viewport tags for encoding, mobile scaling, SEO basics, and accessibility.

Learn how to set the HTML page title and favicon, why they matter for SEO and accessibility, and how to add them correctly in the head.

Learn how HTML comments work, when to use them, how to write them correctly, and common mistakes that break markup or expose hidden content.

Learn how HTML heading tags h1 to h6 structure content, improve accessibility, and create clear page hierarchies without common heading.

Learn how HTML paragraphs work, when to use the p element, common mistakes to avoid, and accessibility best practices for text content.

Learn how to use HTML lists with ul, ol, and dl, including nesting, accessibility, semantics, and common mistakes to avoid.

Learn how HTML links work with the anchor tag, href, and target. See accessibility tips, common mistakes, and practical examples.

Learn HTML text formatting tags like b, i, em, and strong, when to use each, accessibility tips, common mistakes, and examples.

Learn how to use HTML blockquote, q, and cite correctly for quoted text, citations, and accessible semantic markup.

Learn when to use HTML code, pre, kbd, and samp tags to mark code, keyboard input, and sample output with correct semantic and accessible.

Learn HTML character entities like   and ©, when to use them, how they render, and common encoding mistakes to avoid.

Learn how HTML images work with img, srcset, and alt. See responsive image examples, accessibility guidance, and common mistakes to avoid.

Learn how HTML responsive images work with picture and source, including art direction, format switching, fallbacks, and common mistakes.

Learn how to use the HTML audio element to embed sound, add controls, support multiple formats, and make audio playback accessible.

Learn HTML video with the <video> element, essential attributes, multiple sources, captions, autoplay rules, and accessibility best.

Learn how HTML iframe and embed elements work, when to use them, and how to make embedded content accessible and secure.

Learn how HTML figure and figcaption group images, code, and media with captions, improve semantics, and support accessible page structure.

Learn how HTML canvas works, how to draw shapes and text, when to use it, accessibility tips, common mistakes, and practical examples.

Learn how to use inline SVG in HTML, add accessible labels, style shapes with CSS, and avoid common embedding mistakes.

Learn HTML table basics, including table structure, headers, captions, and accessible semantic markup for displaying tabular data correctly.

Learn how HTML table headers work with th, thead, tbody, and scope to make tables accessible, readable, and correctly associated.

Learn how HTML table captions work, where to place them, and how to write accessible, descriptive table labels with the caption element.

Learn how to make HTML tables accessible with captions, headers, scope, and associations that help screen readers understand data.

Learn the HTML form element, common input types, labels, validation, and accessible form structure for collecting user data correctly.

Learn HTML input types like text, email, range, number, date, and file, plus validation, accessibility, and common form mistakes.

Learn how HTML labels improve form accessibility, how to connect them correctly, and common mistakes that break screen reader and click.

Learn how HTML select, option, and datalist work together to build accessible choice controls, dropdowns, and suggested text inputs.

Learn how HTML textarea works, including attributes, accessibility, sizing, validation, and common mistakes when building multi-line form.

Learn how HTML buttons work in forms, when to use button and input submit, default submit behavior, and common accessibility pitfalls.

Learn how HTML form validation works with required and pattern, including accessibility tips, common mistakes, and practical examples.

Learn how HTML form action, method, and enctype control where data goes, how it is sent, and which encoding to use.

Learn why semantic HTML matters, how it improves accessibility, SEO, maintainability, and how to choose the right elements for meaningful.

Learn when to use HTML structural elements like header, nav, main, section, article, aside, and footer for accessible page structure.

Learn the difference between HTML inline and block elements, how they affect layout, and when to use each for semantic, accessible markup.

Learn how HTML microdata and Schema.org structured data work, how to mark up pages, common mistakes, and best practices for SEO.

Learn how to write HTML SEO metadata and Open Graph tags for better search snippets, social previews, accessibility, and page sharing.

Learn HTML global attributes like id, class, style, and title, when to use each one, common mistakes, and accessibility best practices.

Learn how HTML data-* attributes store custom metadata, how to name and read them, and when to use them safely and accessibly.

Learn how HTML ARIA and accessibility attributes improve labels, roles, and keyboard support, plus common mistakes and best practices.

Learn how HTML tabindex works, how focus order is affected, and how to manage keyboard navigation and accessibility safely.

Learn how HTML custom attributes work, when to use data-* attributes, naming rules, and how to avoid common markup mistakes.

Learn how HTML anchors and href work, how to link to pages, sections, email, phone, and files, plus accessibility and common mistakes.

Learn how HTML target and rel attributes control where links open and how to protect users with noreferrer, noopener, and nofollow.

Learn how the HTML nav element works, when to use it, accessibility best practices, common mistakes, and practical navigation examples.

Learn how to build accessible HTML breadcrumbs, when to use them, and how to structure them with semantic markup and ARIA correctly.

Learn how HTML becomes the DOM, how browsers build and update it, and how to inspect structure, elements, and accessibility relationships.

Learn how the HTML Media API uses controls and autoplay on audio and video elements, including accessibility, browser rules, and common.

Learn the HTML Drag and Drop API, how dragstart, dragover, and drop work, plus accessible examples, common mistakes, and best practices.

Learn how Web Components work in HTML, including custom elements, shadow DOM, templates, lifecycle behavior, and common integration.

Learn how localStorage and sessionStorage work in HTML, when to use each, how data persists, and common storage limits and errors.

Learn how to write effective alt text for HTML images, when to use empty alt, and how to avoid common accessibility mistakes.

Learn HTML landmarks for screen readers, including header, nav, main, aside, and footer, to build faster, more accessible page navigation.

Learn how to build accessible HTML forms with labels, fieldsets, help text, error messages, and keyboard-friendly structure.

Learn how ARIA roles and attributes improve HTML accessibility, when to use them, common mistakes, and safe patterns for better support.

Learn how HTML keyboard navigation works, how focus moves, and how to make interactive elements reachable, operable, and usable without a.

Learn how HTML loading attributes lazy, async, and defer affect images and scripts, when to use each one, and how to avoid common loading.

Learn how HTML preload, prefetch, and preconnect improve page speed, when to use each hint, and how to avoid common performance mistakes.

Learn HTML minification best practices, what to remove safely, what to keep, and how to avoid accessibility and debugging problems.

Learn what AMP is, how AMP pages work in HTML, key constraints, validation rules, common mistakes, and when AMP still makes sense today.

Learn how the HTML lang attribute sets document language, improves accessibility, and helps browsers, search engines, and screen readers.

Learn how HTML dir values ltr, rtl, and auto control text direction, how they inherit, and how to avoid common direction and accessibility.

Learn how HTML handles bidirectional text with dir, bdi, and bdo. Control RTL and LTR content safely for accessible multilingual pages.

Learn how HTML sandboxed iframes improve security, what each sandbox token does, common mistakes, and safer ways to embed untrusted content.

Learn how HTML Custom Elements and Shadow DOM create reusable, encapsulated components with lifecycle callbacks, slots, and accessibility.

Learn how HTML <template> and <slot> let you define reusable markup, render hidden content, and project children into web components.

Learn how HTML progress and meter elements work, when to use each one, and how to make them accessible and valid in real pages.

Learn how the HTML dialog element works, when to use it, how to open and close it, and how to build accessible native dialogs.

Learn how HTML details and summary create accessible collapsible content, including syntax, nested content, common mistakes, and best.

Learn why semantic HTML is better than overusing divs and spans, how to choose meaningful elements, and how it improves accessibility and.

Learn why every informative HTML image needs alt text, how to write it well, and how to avoid common accessibility and SEO mistakes.

Learn why every HTML form control needs a label, how to connect labels to inputs, and how to avoid common accessibility mistakes.

Learn why testing HTML accessibility early catches missing labels, poor focus order, and contrast issues before they become costly to fix.

Learn why HTML validation matters, how to validate markup, common errors to fix, and best practices for accessible, reliable pages.

Learn the most important HTML glossary terms, what they mean, and how they relate to semantic markup, accessibility, and document structure.

Learn the most common HTML mistakes, why they happen, and how to fix them with semantic, accessible, and valid markup examples.

Learn what an HTML style guide is, why it matters, and how to apply consistent markup rules for readable, maintainable, accessible pages.

Learn how to migrate HTML4 pages to HTML5, including semantic tags, DOCTYPE updates, deprecated attributes, and common compatibility fixes.

Learn how HTML specifications are defined, how W3C and WHATWG differ, and how the HTML standard is maintained and used in practice.

Learn how HTML standards are proposed, discussed, tested, and merged, plus where to report issues and track changes in the spec.