HTML Validation

Element “meta” is missing one or more of the following attributes: “content”, “itemprop”, “property”.

About This HTML Issue

A <meta> element without a content, itemprop or property attributes has been found in an unexpected place.

Check its attributes and context - depending on the section of the document (<head> or <body>), the <meta> element allows different attributes.

Learn more:

→ HTML Living Spec: Microdata
→ MDN: Microdata

Last reviewed: October 27, 2022

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Reading time

1 min read

Category

HTML Validation

Engine

W3C Validator

Last reviewed

October 27, 2022

Resources

Related W3C Validator Issues (29)

Element “meta” is missing one or more of the following attributes: “charset”, “content”, “http-equiv”, “itemprop”, “name”, “property”.

There’s an incomplete or incorrectly formed <meta> tag. The <meta> tag in HTML is used to provide metadata about the HTML document. This metadata is typically specified using attributes like charset, content, http-equiv, itemprop, name, and property.

To fix this issue, you need to ensure that your <meta> tags include at least one of these attributes. Here are some examples of properly formed <meta> tags with each of these attributes:

Using the charset attribute:
```
<meta charset="UTF-8">
```
This specifies the character encoding for the HTML document, which is crucial for displaying text correctly in different languages.
Using the content and name attributes:
```
<meta name="description" content="A brief description of the webpage content.">
```
This provides a description of the webpage content, which can be used by search engines.
Using the http-equiv and content attributes:
```
<meta http-equiv="refresh" content="30">
```
This specifies information to be passed to the browser, such as refreshing the page every 30 seconds.
Using the property and content attributes:
```
<meta property="og:title" content="Your Webpage Title">
```
This is used for Open Graph meta tags, which improve the appearance of shared content on social media platforms.

Correct Usage Example

Here’s an example of an HTML document with a properly formed set of <meta> tags:

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="A brief description of the webpage content.">
    <meta http-equiv="refresh" content="30">
    <meta property="og:title" content="Your Webpage Title">
    <title>Document</title>
</head>
<body>
<!-- Page content goes here -->

</body>
</html>

Element “meta” is missing one or more of the following attributes: “content”, “property”.

Element “meta” is missing one or more of the following attributes: “itemprop”, “property”.

A <meta> element without a itemprop or property attributes has been found in an unexpected place.

While the <meta> element is commonly used within the <head> section of the document, it can also be used within the <body> section, for example in the context of defining microdata, as in this example:

<div itemprop="offers" itemscope itemtype="http://schema.org/Offer">
  Price: $<span itemprop="price">1.00</span>
  <meta itemprop="priceCurrency" content="USD" />
</div>

When used within the <body> section, the <meta> element is required to have a itemprop or property, and a content attribute, and it can’t have a http-equiv or charset attribute.

A common cause for this issue is including a <meta> element that was intended for the <head> section (for example one containing a http-equiv attribute in the <body> , for example:

<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<form>
  ...
</form>

Bad value “”og:type”” for attribute “property” on element “meta”: The string “”og:type”” is not an absolute URL.

A <meta> element has an invalid value for the property attribute, probably caused by invalid double quotes. Check out the double quotes, ” should be ".

The correct markup for this meta tag should be like:

<meta property="og:type" content="website" />

Bad value “text/html; charset=windows-1251” for attribute “content” on element “meta”: “charset=” must be followed by “utf-8”.

A <meta> tag has been found in the document stating that the charset is windows-1251, but it actually is utf-8. You should update the tag to reflect the actual encoding of the document, for example:

<meta http-equiv="Content-Type" content="text/html; charset=utf-8">

Bad value “text/html; charset=windows-1252” for attribute “content” on element “meta”: “charset=” must be followed by “utf-8”.

A <meta> tag has been found in the document stating that the charset is windows-1252, but it actually is utf-8. You should update the tag to reflect the actual encoding of the document, for example:

<meta http-equiv="Content-Type" content="text/html; charset=utf-8">

Element “link” is missing one or more of the following attributes: “itemprop”, “property”, “rel”.

link elements are used to link to external resources, such as stylesheets, scripts, and icons. Including relevant attributes in the link element helps provide additional information about the linked resource.

rel: The rel attribute specifies the relationship between the current document and the linked resource, and can also provide additional information about the type of linked resource. For example, using rel="stylesheet" for a linked CSS file or rel="icon" for a linked favicon.
itemprop: If the linked resource is an HTML document or a microdata vocabulary like Schema.org, use itemprop to specify properties the linked document or vocabulary defines.
property: If the linked resource is an RDF resource, use property to provide metadata about the relationship between the current document and the resource being linked.

Example with rel attribute:

<head>
  <link rel="stylesheet" href="styles.css">
<!-- Other meta tags -->

</head>

Example with itemprop and property attributes:

<head>
  <link itemprop="mentions" href="https://example.com/"> 
  <link property="schema:citation" href="https://example.com/article.html">
<!-- Other meta tags -->

</head>

By adding itemprop, property, or rel as necessary, you can ensure your link elements provide appropriate context and semantic meaning to your HTML document.

Legacy encoding “windows-1252” used. Documents must use UTF-8.

A “charset” attribute on a “meta” element found after the first 1024 bytes.

charset
meta

The <meta charset> is expected to appear at the beginning of the document, within the first 1024 bytes. Consider moving it to the beginning of the <head> section, as in this example:

<head>
  <meta charset="utf-8">
  ...
</head>

A character encoding declaration is a mechanism by which the character encoding used to store or transmit a document is specified. For HTML documents, the standard way to declare a document character encoding is by including a <meta> tag with a charset attribute, typically <meta charset="utf-8">.

According to the W3C standard:

The element containing the character encoding declaration must be serialized completely within the first 1024 bytes of the document.

A document must not include both a “meta” element with an “http-equiv” attribute whose value is “content-type”, and a “meta” element with a “charset” attribute.

In order to define the charset encoding of an HTML document, both of these options are valid, but only one of them must appear in the document:

<!-- This is the preferred way -->

<meta charset="UTF-8">

<!-- This is the older way, also valid -->

<meta http-equiv="content-type" content="text/html; charset=UTF-8">

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