Mastodon & Fediverse ActivityPub Link Preview Card Formatter
Format ActivityPub Open Graph cards and author attribution for Mastodon and Fediverse servers.
What is the Mastodon & Fediverse Card Previewer?
The Mastodon & Fediverse Card Previewer by CompleteSEOTools is an enterprise social metadata and Open Graph optimization utility engineered to format, debug, validate, and preview link share cards across Facebook, Twitter / X, LinkedIn, Discord, and WhatsApp.
How to Use the Mastodon & Fediverse Card Previewer (Step-by-Step)
Enter Metadata
Input titles, descriptions, canonical URLs, and 1200x630 image paths.
Preview & Validate
Inspect live card previews and validate against WhatsApp 300KB limits.
Deploy to Head
Copy and paste the generated Open Graph meta tags into your HTML <head>.
Open Graph & Social SEO Architecture Guidelines
Ensuring high social CTR requires standard 1200x630 pixel images (1.91:1 aspect ratio), image file sizes under 300KB for WhatsApp compatibility, summary_large_image Twitter cards, and self-referential og:url canonical links.
Frequently Asked Questions (FAQs)
Yes, Mastodon parses standard Open Graph tags and caches link preview cards on local instances.