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Use when reviewing templates, rendered HTML, or shared components related to Declare UTF-8 character encoding. Validate the final browser-facing markup, not just the source framework abstraction.
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| name | charset |
| description | Use when reviewing templates, rendered HTML, or shared components related to Declare UTF-8 character encoding. Validate the final browser-facing markup, not just the source framework abstraction. |
| metadata | {"category":"html","priority":"critical","difficulty":"beginner","estimatedTime":"5","source":"frontendchecklist.io","url":"https://frontendchecklist.io/en/rules/html/charset"} |
Missing or incorrect charset causes mojibake (garbled text), broken special characters, and security vulnerabilities from character encoding attacks.
<meta charset="UTF-8"> as the first element in Verify that this HTML document declares UTF-8 character encoding in the head section and that it's positioned early in the document.
Add as the first meta tag in the head section of the HTML document.
Explain why UTF-8 character encoding is essential for international content support and preventing character display issues.
Review templates, server-rendered HTML, and shared components that output markup related to Declare UTF-8 character encoding. Flag exact elements, attributes, and routes where the rendered HTML violates the rule.
For full implementation details, code examples, and framework-specific guidance,
see references/rule.md.
Rule page: https://frontendchecklist.io/en/rules/html/charset