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", "blurhash": "toot:blurhash", "focalPoint": { "@container": "@list", "@id": "toot:focalPoint" }, "Hashtag": "as:Hashtag" } ], "id": "https://mastodon.social/users/gutenberg_org/statuses/114337208636065569", "type": "Note", "summary": null, "inReplyTo": null, "published": "2025-04-14T16:15:48Z", "url": "https://mastodon.social/@gutenberg_org/114337208636065569", "attributedTo": "https://mastodon.social/users/gutenberg_org", "to": [ "https://www.w3.org/ns/activitystreams#Public" ], "cc": [ "https://mastodon.social/users/gutenberg_org/followers" ], "sensitive": false, "atomUri": "https://mastodon.social/users/gutenberg_org/statuses/114337208636065569", "inReplyToAtomUri": null, "conversation": "tag:mastodon.social,2025-04-14:objectId=972130295:objectType=Conversation", "content": "<p>January 1928: The Dirac equation unifies quantum mechanics and special relativity</p><p>A seminal paper by Paul Dirac, who relied on mathematical intuition, laid the foundation for quantum electrodynamics.</p><p>By Nyla Husain (from the archives)</p><p><a href=\"https://www.aps.org/apsnews/2024/11/mathematical-intuition-dirac-quantum-mechanics\" target=\"_blank\" rel=\"nofollow noopener\" translate=\"no\"><span class=\"invisible\">https://www.</span><span class=\"ellipsis\">aps.org/apsnews/2024/11/mathem</span><span class=\"invisible\">atical-intuition-dirac-quantum-mechanics</span></a></p><p><a href=\"https://mastodon.social/tags/science\" class=\"mention hashtag\" rel=\"tag\">#<span>science</span></a> <a href=\"https://mastodon.social/tags/physics\" class=\"mention hashtag\" rel=\"tag\">#<span>physics</span></a> <a href=\"https://mastodon.social/tags/quantummechanics\" class=\"mention hashtag\" rel=\"tag\">#<span>quantummechanics</span></a> <a href=\"https://mastodon.social/tags/relativity\" class=\"mention hashtag\" rel=\"tag\">#<span>relativity</span></a></p>", "contentMap": { "en": "<p>January 1928: The Dirac equation unifies quantum mechanics and special relativity</p><p>A seminal paper by Paul Dirac, who relied on mathematical intuition, laid the foundation for quantum electrodynamics.</p><p>By Nyla Husain (from the archives)</p><p><a href=\"https://www.aps.org/apsnews/2024/11/mathematical-intuition-dirac-quantum-mechanics\" target=\"_blank\" rel=\"nofollow noopener\" translate=\"no\"><span class=\"invisible\">https://www.</span><span class=\"ellipsis\">aps.org/apsnews/2024/11/mathem</span><span class=\"invisible\">atical-intuition-dirac-quantum-mechanics</span></a></p><p><a href=\"https://mastodon.social/tags/science\" class=\"mention hashtag\" rel=\"tag\">#<span>science</span></a> <a href=\"https://mastodon.social/tags/physics\" class=\"mention hashtag\" rel=\"tag\">#<span>physics</span></a> <a href=\"https://mastodon.social/tags/quantummechanics\" class=\"mention hashtag\" rel=\"tag\">#<span>quantummechanics</span></a> <a href=\"https://mastodon.social/tags/relativity\" class=\"mention hashtag\" rel=\"tag\">#<span>relativity</span></a></p>" }, "attachment": [ { "type": "Document", "mediaType": "image/jpeg", "url": "https://files.mastodon.social/media_attachments/files/114/337/202/870/485/902/original/987486c8e8319a44.jpeg", "name": "Paul Dirac once said that his theories are “built up from physical concepts which cannot be explained in words at all.\"\n\nAIP Emilio Segrè Visual Archives", "blurhash": "UECi~;%MM{IU~qxuM{%M~qWBayWB-;ofWBay", "focalPoint": [ -0.03, 0.16 ], "width": 828, "height": 634 } ], "tag": [ { "type": "Hashtag", "href": "https://mastodon.social/tags/science", "name": "#science" }, { "type": "Hashtag", "href": "https://mastodon.social/tags/physics", "name": "#physics" }, { "type": "Hashtag", "href": "https://mastodon.social/tags/quantummechanics", "name": "#quantummechanics" }, { "type": "Hashtag", "href": "https://mastodon.social/tags/relativity", "name": "#relativity" } ], "replies": { "id": "https://mastodon.social/users/gutenberg_org/statuses/114337208636065569/replies", "type": "Collection", "first": { "type": "CollectionPage", "next": "https://mastodon.social/users/gutenberg_org/statuses/114337208636065569/replies?only_other_accounts=true&page=true", "partOf": "https://mastodon.social/users/gutenberg_org/statuses/114337208636065569/replies", "items": [] } }, "likes": { "id": "https://mastodon.social/users/gutenberg_org/statuses/114337208636065569/likes", "type": "Collection", "totalItems": 49 }, "shares": { "id": "https://mastodon.social/users/gutenberg_org/statuses/114337208636065569/shares", "type": "Collection", "totalItems": 36 } }