Annotations Extensibility
ChatGPT plugin by OpenAI · Customize how annotation mode interacts with your site.
About Annotations Extensibility
Annotations Extensibility is a ChatGPT plugin by OpenAI in the Developer Tools category of the ChatGPT plugin directory. Its listing describes it as “Customize how annotation mode interacts with your site.”. It has been tracked in the directory since Oct 2, 2026.
Annotations Extensibility does not currently reach the top 10 for common Developer Tools searches in the directory, so most people find it by searching for its name.
On the directory's Developer Tools page it is listed at position 256 of 277.
Customize what happens when someone uses annotation mode on your website in the ChatGPT browser. Choose which parts of the page they can select, add useful context to their comments, and offer controls that preview changes such as color, size, or visibility.From the plugin’s directory listing
Search positions
Annotations Extensibility is not in the results of any tracked search.
Listing check
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0 / 30Put a search term in the name Search rankThe name has none of the tracked search terms.Directory search ranks name matches first: 74% of top-3 results have the search term in the name. Searches for a brand name itself are not tracked.8 of 20 category leaders do this
Recent changes
No changes yet.
Annotations Extensibility: questions and answers
What does Annotations Extensibility do?
Customize how annotation mode interacts with your site. Customize what happens when someone uses annotation mode on your website in the ChatGPT browser. Choose which parts of the page they can select, add useful context to their comments, and offer controls that preview changes such as color, size, or visibility.
Who makes Annotations Extensibility?
Annotations Extensibility is developed by OpenAI.
How do I add Annotations Extensibility to ChatGPT?
Open ChatGPT, go to Plugins, search for “Annotations Extensibility” and select Install plugin. You can also open its page in the directory directly.
Is Annotations Extensibility still available in ChatGPT?
Yes. Annotations Extensibility was listed in the ChatGPT plugin directory at the latest hourly check.