I mostly made this for my own use. When you click it on an AO3 Work it will use the information from the Share button to make you a new link post (with the metadata in the body).

Submit to Tumblr (AO3)

Usage Instructions:

1. Install the bookmarklet in your browser. (For more information, see How to Use Bookmarklets.)
2. Load the AO3 work you wish to share and click the bookmarklet. A new window will be opened with a Tumblr post including the work's share information.

Original Tumblr bookmarklet from the Tumblr website.