HTML Best Practices
Writing high-quality HTML means using semantic elements over generic divs, always including alt text, closing tags properly, and validating your markup against W3C standards.
Consistent indentation, lowercase tag/attribute names, and separating structure (HTML) from presentation (CSS) and behavior (JavaScript) all lead to more maintainable, accessible, and performant websites over time.
<!-- Follow W3C standards and validate your HTML -->Structure and style
Use semantic tags where they fit, keep indentation consistent, use lowercase for tags and attributes, and always quote attribute values for clarity and compatibility.
Accessibility, performance, and validation
Always add alt text and form labels, declare charset and viewport, optimize images, and run your HTML through the W3C Validator to catch structural errors.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Best Practices Example</title>
</head>
<body>
<header><h1>My Site</h1></header>
<main><p>Well-structured content.</p></main>
<footer><p>© 2024</p></footer>
</body>
</html>My Site
Well-structured content.
Β© 2024A clean, valid, semantic, and accessible baseline page structure.
<img src="team.jpg" alt="Our team at the 2024 offsite retreat">(descriptive alt text aids both accessibility and SEO)Good alt text describes meaningful content, not just 'image' or the filename.
Key points
- Prefer semantic elements over generic divs when meaning exists.
- Always close tags properly and quote attribute values.
- Include alt text, labels, charset, and viewport declarations.
- Validate HTML with the W3C Validator to catch errors early.