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.offerman.com/users/adrian/statuses/114420497107654064", "type": "Note", "summary": null, "inReplyTo": "https://mastodon.offerman.com/users/adrian/statuses/114415591654188044", "published": "2025-04-29T09:17:09Z", "url": "https://mastodon.offerman.com/@adrian/114420497107654064", "attributedTo": "https://mastodon.offerman.com/users/adrian", "to": [ "https://www.w3.org/ns/activitystreams#Public" ], "cc": [ "https://mastodon.offerman.com/users/adrian/followers", "https://mastodon.social/users/stalwartlabs" ], "sensitive": false, "atomUri": "https://mastodon.offerman.com/users/adrian/statuses/114420497107654064", "inReplyToAtomUri": "https://mastodon.offerman.com/users/adrian/statuses/114415591654188044", "conversation": "tag:mastodon.offerman.com,2025-04-28:objectId=514044:objectType=Conversation", "content": "<p>now also available in English:<br />Four modern mail systems for self-hosting -- Universal support for mail security standards<br /><a href=\"https://www.sidn.nl/en/news-and-blogs/four-modern-mail-systems-for-self-hosting\" target=\"_blank\" rel=\"nofollow noopener noreferrer\" translate=\"no\"><span class=\"invisible\">https://www.</span><span class=\"ellipsis\">sidn.nl/en/news-and-blogs/four</span><span class=\"invisible\">-modern-mail-systems-for-self-hosting</span></a></p><p>An increasing number of mail software packages are now available that offer out-of-box support for all security standards, and are easy to set up as well. In this article, we consider four modern open-source packages for self-hosting: <a href=\"https://mastodon.offerman.com/tags/Mox\" class=\"mention hashtag\" rel=\"tag\">#<span>Mox</span></a>, <a href=\"https://mastodon.offerman.com/tags/Chasquid\" class=\"mention hashtag\" rel=\"tag\">#<span>Chasquid</span></a>, <a href=\"https://mastodon.offerman.com/tags/Stalwart\" class=\"mention hashtag\" rel=\"tag\">#<span>Stalwart</span></a> and <a href=\"https://mastodon.offerman.com/tags/Maddy\" class=\"mention hashtag\" rel=\"tag\">#<span>Maddy</span></a>.</p><p><a href=\"https://mastodon.offerman.com/tags/SPF\" class=\"mention hashtag\" rel=\"tag\">#<span>SPF</span></a> <a href=\"https://mastodon.offerman.com/tags/DKIM\" class=\"mention hashtag\" rel=\"tag\">#<span>DKIM</span></a> <a href=\"https://mastodon.offerman.com/tags/DMARC\" class=\"mention hashtag\" rel=\"tag\">#<span>DMARC</span></a> <a href=\"https://mastodon.offerman.com/tags/DANE\" class=\"mention hashtag\" rel=\"tag\">#<span>DANE</span></a> <a href=\"https://mastodon.offerman.com/tags/STARTTLS\" class=\"mention hashtag\" rel=\"tag\">#<span>STARTTLS</span></a> <a href=\"https://mastodon.offerman.com/tags/MTA\" class=\"mention hashtag\" rel=\"tag\">#<span>MTA</span></a>-STS <a href=\"https://mastodon.offerman.com/tags/InternetSecurity\" class=\"mention hashtag\" rel=\"tag\">#<span>InternetSecurity</span></a></p><p><span class=\"h-card\" translate=\"no\"><a href=\"https://mastodon.social/@stalwartlabs\" class=\"u-url mention\">@<span>stalwartlabs</span></a></span></p>", "contentMap": { "en": "<p>now also available in English:<br />Four modern mail systems for self-hosting -- Universal support for mail security standards<br /><a href=\"https://www.sidn.nl/en/news-and-blogs/four-modern-mail-systems-for-self-hosting\" target=\"_blank\" rel=\"nofollow noopener noreferrer\" translate=\"no\"><span class=\"invisible\">https://www.</span><span class=\"ellipsis\">sidn.nl/en/news-and-blogs/four</span><span class=\"invisible\">-modern-mail-systems-for-self-hosting</span></a></p><p>An increasing number of mail software packages are now available that offer out-of-box support for all security standards, and are easy to set up as well. In this article, we consider four modern open-source packages for self-hosting: <a href=\"https://mastodon.offerman.com/tags/Mox\" class=\"mention hashtag\" rel=\"tag\">#<span>Mox</span></a>, <a href=\"https://mastodon.offerman.com/tags/Chasquid\" class=\"mention hashtag\" rel=\"tag\">#<span>Chasquid</span></a>, <a href=\"https://mastodon.offerman.com/tags/Stalwart\" class=\"mention hashtag\" rel=\"tag\">#<span>Stalwart</span></a> and <a href=\"https://mastodon.offerman.com/tags/Maddy\" class=\"mention hashtag\" rel=\"tag\">#<span>Maddy</span></a>.</p><p><a href=\"https://mastodon.offerman.com/tags/SPF\" class=\"mention hashtag\" rel=\"tag\">#<span>SPF</span></a> <a href=\"https://mastodon.offerman.com/tags/DKIM\" class=\"mention hashtag\" rel=\"tag\">#<span>DKIM</span></a> <a href=\"https://mastodon.offerman.com/tags/DMARC\" class=\"mention hashtag\" rel=\"tag\">#<span>DMARC</span></a> <a href=\"https://mastodon.offerman.com/tags/DANE\" class=\"mention hashtag\" rel=\"tag\">#<span>DANE</span></a> <a href=\"https://mastodon.offerman.com/tags/STARTTLS\" class=\"mention hashtag\" rel=\"tag\">#<span>STARTTLS</span></a> <a href=\"https://mastodon.offerman.com/tags/MTA\" class=\"mention hashtag\" rel=\"tag\">#<span>MTA</span></a>-STS <a href=\"https://mastodon.offerman.com/tags/InternetSecurity\" class=\"mention hashtag\" rel=\"tag\">#<span>InternetSecurity</span></a></p><p><span class=\"h-card\" translate=\"no\"><a href=\"https://mastodon.social/@stalwartlabs\" class=\"u-url mention\">@<span>stalwartlabs</span></a></span></p>" }, "attachment": [ { "type": "Document", "mediaType": "image/png", "url": "https://cdn.masto.host/mastodonoffermancom/media_attachments/files/114/420/492/417/313/456/original/0a5c4ea10d4087aa.png", "name": null, "blurhash": "U5Ss50004n%M?bxvWCa#M{?HofRj%Loes:t7", "width": 1645, "height": 1040 }, { "type": "Document", "mediaType": "image/png", "url": "https://cdn.masto.host/mastodonoffermancom/media_attachments/files/114/420/493/449/410/957/original/cae5452be98732da.png", "name": null, "blurhash": "U7R{#-RkS5aK^-xte.t7_4xuRjx]4;t6xujY", "width": 990, "height": 412 } ], "tag": [ { "type": "Mention", "href": "https://mastodon.social/users/stalwartlabs", "name": "@stalwartlabs@mastodon.social" }, { "type": "Hashtag", "href": "https://mastodon.offerman.com/tags/mox", "name": "#mox" }, { "type": "Hashtag", "href": "https://mastodon.offerman.com/tags/chasquid", "name": "#chasquid" }, { "type": "Hashtag", "href": "https://mastodon.offerman.com/tags/stalwart", "name": "#stalwart" }, { "type": "Hashtag", "href": "https://mastodon.offerman.com/tags/maddy", "name": "#maddy" }, { "type": "Hashtag", "href": "https://mastodon.offerman.com/tags/spf", "name": "#spf" }, { "type": "Hashtag", "href": "https://mastodon.offerman.com/tags/dkim", "name": "#dkim" }, { "type": "Hashtag", "href": "https://mastodon.offerman.com/tags/dmarc", "name": "#dmarc" }, { "type": "Hashtag", "href": "https://mastodon.offerman.com/tags/DANE", "name": "#DANE" }, { "type": "Hashtag", "href": "https://mastodon.offerman.com/tags/starttls", "name": "#starttls" }, { "type": "Hashtag", "href": "https://mastodon.offerman.com/tags/mta", "name": "#mta" }, { "type": "Hashtag", "href": "https://mastodon.offerman.com/tags/internetsecurity", "name": "#internetsecurity" } ], "replies": { "id": "https://mastodon.offerman.com/users/adrian/statuses/114420497107654064/replies", "type": "Collection", "first": { "type": "CollectionPage", "next": "https://mastodon.offerman.com/users/adrian/statuses/114420497107654064/replies?only_other_accounts=true&page=true", "partOf": "https://mastodon.offerman.com/users/adrian/statuses/114420497107654064/replies", "items": [] } }, "likes": { "id": "https://mastodon.offerman.com/users/adrian/statuses/114420497107654064/likes", "type": "Collection", "totalItems": 0 }, "shares": { "id": "https://mastodon.offerman.com/users/adrian/statuses/114420497107654064/shares", "type": "Collection", "totalItems": 0 } }