Loading skill
Install any skill in seconds. Free to start, no credit card required.
Get Started Free →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.
| Test case | Without → With | Effect | Δ tokens | Δ turns |
|---|---|---|---|---|
| case-07 | ✗→✓ | ▲ Improved | -25% | 0% |
| case-09 | ✗→✓ | ▲ Improved | -46% | 0% |
| case-17 | ✓→✗ | ▼ Worse | -6% | 0% |
| case-01 | ✓→✓ | ＝ Same ✓ | -2% | 0% |
| case-02 | ✓→✓ | ＝ Same ✓ | -9% | 0% |
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 <head>Verify that this HTML document declares UTF-8 character encoding in the head section and that it's positioned early in the document.
Add <meta charset="UTF-8"> 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
Other measured skills in the registry, with their headline benchmark lift.