# Tumblr Open Graph

## Test and debug your Open Graph tags for Tumblr

### Tumblr 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 | Tumblr/14.0 |

[Official docs](https://www.tumblr.com/docs/en/share_button)

When someone creates a link post on Tumblr, the `Tumblr` crawler fetches the page to generate a rich preview card that appears in the dashboard feed. Tumblr’s crawler has historically been inconsistent with its user agent string, does not execute JavaScript, and reads standard Open Graph meta tags to populate link post previews.

This guide covers how Tumblr’s crawler works, which tags it reads, image handling within the 540px-wide dashboard layout, cache behavior, and common issues – including the historically problematic user agent behavior that caused issues with prerender services.

## What links look like on Tumblr

### The difference Open Graph tags make when sharing a link.

Without Open Graph

This site doesn't have Open Graph

Tumblr Open Graph

opengraphplus.com

Oh

With Open Graph

Sites with Open Graph look like this

Tumblr Open Graph

opengraphplus.com

Nice!

### Debug Tumblr Open Graph tags

Enter your site's URL to see how it looks on Tumblr.