Link Previews turn shared web addresses into rich Markdown cards using metadata the page already publishes.
Metadata
- Open Graph title, description, image, URL, and site name
- Twitter/X Card title, description, image, and URL fallbacks
- Schema.org JSON-LD headline, description, image, publisher, and provider fallbacks
- HTML title, description, and canonical URL fallbacks
- oEmbed JSON discovered from page links or HTTP Link headers
Used By
RSS bots use Link Previews to post new feed items with a source label, linked title, optional preview image, and optional description.
The same shared extractor also powers URL title previews and can be reused by future chat link card features.
Safety
- Only HTTP and HTTPS URLs are fetched
- URLs with embedded credentials are refused
- Private, local, documentation, benchmark, multicast, and reserved address ranges are blocked
- Redirects and discovered oEmbed/image URLs are checked before use
- Markdown images are sanitized, lazy-loaded, and rendered without referrer leakage
