Favicon and Open Graph debugging for a polished product launch
The tiny assets that shape trust in search results, chat previews, browser tabs, and directory listings—and how to test their actual HTTP responses.
By Launcholio4 min read
Favicon is an HTTP contract
The link element is only a pointer. The target must be reachable, return an image content type, and contain a format the browser can decode. Keep an ICO or PNG fallback for broad compatibility; do not rely on a path that works only in your dev server.
Open Graph must describe the same page
Use an absolute HTTPS image URL, a useful 1200×630 preview, and copy that matches the visible title and description. If a proxy or CDN caches an old image, version the asset URL when the design changes.
- og:url is the canonical public URL.
- og:image is absolute and returns 200 with an image MIME type.
- Twitter card metadata has a sensible fallback.
- The preview remains legible without relying on hover or animation.
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