HTML Validation
4 min read
Validate HTML at validator.w3.org or with HTMLHint in your editor. Fix missing alt attributes, duplicate IDs, skipped heading levels, and unlabeled inputs. Valid HTML renders more consistently across all browsers.
Validating HTML
- Use the W3C validator: validator.w3.org
- Install HTMLHint for real-time editor feedback
- Run
npx html-validate in your project - Chrome DevTools shows HTML errors in the console
- Common errors to fix: unclosed tags, missing alt text, duplicate IDs