Question 1

Does developer.mozilla.org declare an og:type?

Accepted Answer

No - developer.mozilla.org does not set an `og:type` meta tag. Most platforms default to `website`, but explicitly declaring it ensures consistent rendering.

Question 2

Does developer.mozilla.org have a social share image?

Accepted Answer

No - developer.mozilla.org does not currently set an `og:image` or `twitter:image`. Slack will fall back to extracting an image from the page or render no preview image at all.

Question 3

What headline does developer.mozilla.org use for social previews?

Accepted Answer

developer.mozilla.org's social headline is "MDN Web Docs" (12 characters).

Question 4

What description does developer.mozilla.org use for social previews?

Accepted Answer

developer.mozilla.org's social description reads: "The MDN Web Docs site provides information about Open Web technologies including HTML, CSS, and APIs for both Web sites and progressive web apps." (145 characters).

Question 5

What's the biggest issue with developer.mozilla.org's Slack preview?

Accepted Answer

No social share image found. Without an image, your shared links get significantly fewer clicks. Posts with images receive 2-3x more engagement.

Question 6

How can I improve developer.mozilla.org's social previews?

Accepted Answer

Review the recommendations above - they list specific issues and provide ready-to-paste meta tag snippets. The highest-impact fixes are usually a properly sized `og:image` (800×418), a clear `og:title` under 60 characters, and a 50-155 character `og:description`.

How developer.mozilla.org Looks on Slack

Slack preview

Slack

Recommendations

Analysis

Frequently Asked Questions

See developer.mozilla.org on other platforms

Validate other sites on Slack

Validate your own URL