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.

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{ "@context": [ "https://www.w3.org/ns/activitystreams", { "ostatus": "http://ostatus.org#", "atomUri": "ostatus:atomUri", "inReplyToAtomUri": "ostatus:inReplyToAtomUri", "conversation": "ostatus:conversation", "sensitive": "as:sensitive", "toot": "http://joinmastodon.org/ns#", "votersCount": "toot:votersCount", "Hashtag": "as:Hashtag" } ], "id": "https://helmholtz.social/users/HelmholtzImaging/statuses/114669704483287154", "type": "Note", "summary": null, "inReplyTo": "https://helmholtz.social/users/association/statuses/114668989221841423", "published": "2025-06-12T09:33:52Z", "url": "https://helmholtz.social/@HelmholtzImaging/114669704483287154", "attributedTo": "https://helmholtz.social/users/HelmholtzImaging", "to": [ "https://www.w3.org/ns/activitystreams#Public" ], "cc": [ "https://helmholtz.social/users/HelmholtzImaging/followers", "https://helmholtz.social/users/association", "https://helmholtz.social/users/helmholtz_hmc" ], "sensitive": false, "atomUri": "https://helmholtz.social/users/HelmholtzImaging/statuses/114669704483287154", "inReplyToAtomUri": "https://helmholtz.social/users/association/statuses/114668989221841423", "conversation": "tag:helmholtz.social,2025-06-12:objectId=8122568:objectType=Conversation", "content": "<p>Helmholtz turns 30 – and shares 30 inspiring stories from across the <span class=\"h-card\" translate=\"no\"><a href=\"https://helmholtz.social/@association\" class=\"u-url mention\">@<span>association</span></a></span>. Today’s spotlight: the Helmholtz Information &amp; Data Science platforms – including <a href=\"https://helmholtz.social/tags/HelmholtzImaging\" class=\"mention hashtag\" rel=\"tag\">#<span>HelmholtzImaging</span></a>, Helmholtz AI, HIDA, HIFIS &amp; <span class=\"h-card\" translate=\"no\"><a href=\"https://helmholtz.social/@helmholtz_hmc\" class=\"u-url mention\">@<span>helmholtz_hmc</span></a></span>. </p><p>Read more 👆 </p><p><a href=\"https://helmholtz.social/tags/Helmholtz30\" class=\"mention hashtag\" rel=\"tag\">#<span>Helmholtz30</span></a> <a href=\"https://helmholtz.social/tags/DataScience\" class=\"mention hashtag\" rel=\"tag\">#<span>DataScience</span></a> <a href=\"https://helmholtz.social/tags/imaging\" class=\"mention hashtag\" rel=\"tag\">#<span>imaging</span></a></p>", "contentMap": { "en": "<p>Helmholtz turns 30 – and shares 30 inspiring stories from across the <span class=\"h-card\" translate=\"no\"><a href=\"https://helmholtz.social/@association\" class=\"u-url mention\">@<span>association</span></a></span>. Today’s spotlight: the Helmholtz Information &amp; Data Science platforms – including <a href=\"https://helmholtz.social/tags/HelmholtzImaging\" class=\"mention hashtag\" rel=\"tag\">#<span>HelmholtzImaging</span></a>, Helmholtz AI, HIDA, HIFIS &amp; <span class=\"h-card\" translate=\"no\"><a href=\"https://helmholtz.social/@helmholtz_hmc\" class=\"u-url mention\">@<span>helmholtz_hmc</span></a></span>. </p><p>Read more 👆 </p><p><a href=\"https://helmholtz.social/tags/Helmholtz30\" class=\"mention hashtag\" rel=\"tag\">#<span>Helmholtz30</span></a> <a href=\"https://helmholtz.social/tags/DataScience\" class=\"mention hashtag\" rel=\"tag\">#<span>DataScience</span></a> <a href=\"https://helmholtz.social/tags/imaging\" class=\"mention hashtag\" rel=\"tag\">#<span>imaging</span></a></p>" }, "attachment": [], "tag": [ { "type": "Mention", "href": "https://helmholtz.social/users/association", "name": "@association" }, { "type": "Mention", "href": "https://helmholtz.social/users/helmholtz_hmc", "name": "@helmholtz_hmc" }, { "type": "Hashtag", "href": "https://helmholtz.social/tags/helmholtzimaging", "name": "#helmholtzimaging" }, { "type": "Hashtag", "href": "https://helmholtz.social/tags/helmholtz30", "name": "#helmholtz30" }, { "type": "Hashtag", "href": "https://helmholtz.social/tags/datascience", "name": "#datascience" }, { "type": "Hashtag", "href": "https://helmholtz.social/tags/imaging", "name": "#imaging" } ], "replies": { "id": "https://helmholtz.social/users/HelmholtzImaging/statuses/114669704483287154/replies", "type": "Collection", "first": { "type": "CollectionPage", "next": "https://helmholtz.social/users/HelmholtzImaging/statuses/114669704483287154/replies?only_other_accounts=true&page=true", "partOf": "https://helmholtz.social/users/HelmholtzImaging/statuses/114669704483287154/replies", "items": [] } }, "likes": { "id": "https://helmholtz.social/users/HelmholtzImaging/statuses/114669704483287154/likes", "type": "Collection", "totalItems": 1 }, "shares": { "id": "https://helmholtz.social/users/HelmholtzImaging/statuses/114669704483287154/shares", "type": "Collection", "totalItems": 1 } }