ActivityPub Viewer

A small tool to view real-world ActivityPub objects as JSON! Enter a URL or username from Mastodon or a similar service below, and we'll send a request with the right Accept header to the server to view the underlying object.

Open in browser →
{ "@context": [ "https://www.w3.org/ns/activitystreams", { "Hashtag": "as:Hashtag" } ], "id": "https://mastos.online/users/nicholasr/collections/tags", "type": "Collection", "totalItems": 9, "items": [ { "type": "Hashtag", "href": "https://mastos.online/@nicholasr/tagged/fediverse", "name": "#fediverse" }, { "type": "Hashtag", "href": "https://mastos.online/@nicholasr/tagged/mastodon", "name": "#mastodon" }, { "type": "Hashtag", "href": "https://mastos.online/@nicholasr/tagged/linux", "name": "#linux" }, { "type": "Hashtag", "href": "https://mastos.online/@nicholasr/tagged/opensource", "name": "#OpenSource" }, { "type": "Hashtag", "href": "https://mastos.online/@nicholasr/tagged/space", "name": "#space" }, { "type": "Hashtag", "href": "https://mastos.online/@nicholasr/tagged/debian", "name": "#debian" }, { "type": "Hashtag", "href": "https://mastos.online/@nicholasr/tagged/proton", "name": "#proton" }, { "type": "Hashtag", "href": "https://mastos.online/@nicholasr/tagged/starcitizen", "name": "#StarCitizen" }, { "type": "Hashtag", "href": "https://mastos.online/@nicholasr/tagged/opensourceai", "name": "#OpenSourceAI" } ] }