YouTip# HTML http-equiv Attribute
The `http-equiv` attribute of the `` tag provides an HTTP header for the information/value of the `content` attribute. It is essentially used to simulate an HTTP response header in the HTML document when the server-side configuration cannot be modified directly.
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## Browser Support
The `http-equiv` attribute is fully supported by all major modern web browsers:
* Google Chrome
* Mozilla Firefox
* Safari
* Microsoft Edge
* Opera
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## Definition and Usage
The `http-equiv` attribute works in tandem with the `content` attribute. When a browser processes a `` tag with `http-equiv`, it interprets the instruction as if it had been sent directly in the actual HTTP response headers from the web server.
### Differences Between HTML 4.01 and HTML5
In HTML 4.01, declaring the character encoding of a document required using the `http-equiv` attribute. In HTML5, a much simpler, dedicated `charset` attribute was introduced.
* **HTML 4.01 Syntax:**
```html
```
* **HTML5 Syntax:**
```html
```
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## Syntax
```html
```
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## Attribute Values
| Value | Description |
| :--- | :--- |
| `content-type` | Specifies the character encoding for the document.
**Example:**
`` |
| `default-style` | Specifies the preferred stylesheet to be used for the document.
**Example:**
``
**Note:** The value of the `content` attribute must match the value of the `title` attribute on a `` element or a `