Signal Open Graph
Test and debug your Open Graph tags for Signal
Signal Specs
| Image size | 1200x630px |
| Aspect ratio | 1.9:1 |
| Max file size | 5 MB |
| Formats | image/jpeg, image/png, image/webp, image/gif |
| User-Agent | Signal/1.0 |
Signal generates link previews client-side on the sender’s device, routing requests through a TLS privacy proxy to protect the sender’s IP address. It identifies itself with the user agent WhatsApp/2, masquerading as WhatsApp to avoid being filtered differently. Signal reads og:title, og:description, and og:image from the initial HTML response and only supports HTTPS URLs.
This guide covers how Signal’s privacy-focused crawler works, which tags it reads, image requirements, its unique client-side caching model, and the most common issues that prevent previews from appearing.
What links look like on Signal
The difference Open Graph tags make when sharing a link.
Without Open Graph
This site doesn't have Open Graph
With Open Graph
Sites with Open Graph look like this
Signal Open Graph
opengraphplus.com
Nice!
Debug Signal Open Graph tags
Enter your site's URL to see how it looks on Signal.