---
title: seo/charset ยท Character encoding
description: The page should declare a character encoding with .
---
**Severity:** warning
## What it checks
Flags a rendered page with no `` declaration.
## Why it matters
Without a declared character encoding the browser must guess, which can render text as mojibake. `` is the standard, unambiguous declaration and should be the first thing in ``.
## How to fix
```html src/app.html
%sveltekit.head%
```
## Mode differences
**Rendered analysis only** (the Vite plugin's build pass, a route you visit in the dashboard). The tag lives in `src/app.html`, which source analysis (the CLI, the dashboard's static baseline) does not resolve, so that pass reports nothing for this rule.
## Disabling
Record existing findings in the suppressions file (`npx svelte-vitals --update-suppressions`), scope the rule per route or path with `overrides`, or turn it off:
```js svelte-vitals.config.js
export default {
rules: {
'seo/charset': 'off'
}
};
```