Summary
The minimum allowed image dimension when sharing content to Facebook is 200 x 200 pixels and the size of the image file must not exceed 8 MB. This is according to the Open Graph meta-tag og:image
1
, as well as the Sharing Debugger, Graph API, and og:image:width and og:image:height Open Graph tags.
1
2
Additionally, best practices for implementing Facebook Sharing for websites and mobile apps are provided, such as using the Facebook Crawler to generate a preview of publicly available Facebook content, using Open Graph meta tags, and tracking interactions of people on the website.
2
According to
Summary
The Open Graph meta-tag og:image can be used to specify the URL of the image that appears when someone shares content to Facebook. The minimum allowed image dimension is 200 x 200 pixels and the size of the image file must not exceed 8 MB. There are three ways to pre-cache images: with the Sharing Debugger, using the Graph API, or using the og:image:width and og:image:height Open Graph tags.
Images in Link Shares - Sharing - Documentation - Meta for Developers
facebook.com
Summary
This article provides best practices for implementing Facebook Sharing for websites and mobile apps, such as using the Facebook Crawler to generate a preview of publicly available Facebook content, using Open Graph meta tags, and tracking interactions of people on the website. It also provides recommendations for images for mobile apps, such as using app links to a specific location in the app from Facebook, using Message Dialog for private sharing, and tracking mobile referral traffic to the website from Facebook. Finally, it provides tips on how to use the HTTP User-Agent Header to track mobile referral traffic to the website from Facebook.
Best Practices - Sharing - Documentation - Meta for Developers
facebook.com
An updated guide to sizes and types for using photos and graphics on Facebook timelines ... It seems like the only safe thing to do now is to share an image ...
Facebook Photos Size Guide | June 2021
havecamerawilltravel.com
