Slack Link Unfurling & Attachment Card Meta Tag Inspector
Test how Slack unfurls links in channels using `twitter:label1`, `twitter:data1`, and author metadata.
What is the Slack Link Unfurling Inspector?
The Slack Link Unfurling Inspector 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 Slack Link Unfurling Inspector (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)
Slack's automatic fetching and display of title, description, and thumbnail card when a URL is posted.