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", "http://joinmastodon.org/ns" ], "attachment": { "mediaType": "image/jpeg", "name": "Live stream preview", "type": "Image", "url": "https://fj25.de/thumbnail.jpg?us=9T2MFZLHR" }, "attributedTo": "https://fj25.de/federation/user/fastjack25", "cc": "https://fj25.de/federation/user/fastjack25/followers", "content": "<p>Ich bin mal wieder live, schau doch im Stream vorbei.</p><p>Trash-Tuesday: House Flipper</p><p><a class=\"hashtag\" href=\"https://directory.owncast.online/tags/streaming\">#streaming</a> <a class=\"hashtag\" href=\"https://directory.owncast.online/tags/retro\">#retro</a> <a class=\"hashtag\" href=\"https://directory.owncast.online/tags/casual\">#casual</a> <a class=\"hashtag\" href=\"https://directory.owncast.online/tags/gaming\">#gaming</a> <a class=\"hashtag\" href=\"https://directory.owncast.online/tags/deutsch\">#deutsch</a> <a class=\"hashtag\" href=\"https://directory.owncast.online/tags/linux\">#linux</a> <a class=\"hashtag\" href=\"https://directory.owncast.online/tags/linuxgaming\">#linuxgaming</a> <a class=\"hashtag\" href=\"https://directory.owncast.online/tags/german\">#german</a> <a class=\"hashtag\" href=\"https://directory.owncast.online/tags/videogames\">#videogames</a></p><p><a href=\"https://fj25.de\">https://fj25.de</a></p>", "id": "https://fj25.de/federation/XohMFWYNR", "published": "2025-06-05T19:40:28+02:00", "tag": [ { "href": "https://directory.owncast.online/tags/streaming", "name": "#streaming", "type": "Hashtag" }, { "href": "https://directory.owncast.online/tags/retro", "name": "#retro", "type": "Hashtag" }, { "href": "https://directory.owncast.online/tags/casual", "name": "#casual", "type": "Hashtag" }, { "href": "https://directory.owncast.online/tags/gaming", "name": "#gaming", "type": "Hashtag" }, { "href": "https://directory.owncast.online/tags/deutsch", "name": "#deutsch", "type": "Hashtag" }, { "href": "https://directory.owncast.online/tags/linux", "name": "#linux", "type": "Hashtag" }, { "href": "https://directory.owncast.online/tags/linuxgaming", "name": "#linuxgaming", "type": "Hashtag" }, { "href": "https://directory.owncast.online/tags/german", "name": "#german", "type": "Hashtag" }, { "href": "https://directory.owncast.online/tags/videogames", "name": "#videogames", "type": "Hashtag" }, { "href": "https://directory.owncast.online/tags/owncast", "name": "#owncast", "type": "Hashtag" } ], "to": "https://www.w3.org/ns/activitystreams#Public", "type": "Note" }