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.
{
"@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"
}
],
"id": "https://mastodon.online/users/ThreeSigma/statuses/114280518249920393",
"type": "Note",
"summary": null,
"inReplyTo": "https://mastodon.online/users/KilleansRow/statuses/114266367157114219",
"published": "2025-04-04T15:58:41Z",
"url": "https://mastodon.online/@ThreeSigma/114280518249920393",
"attributedTo": "https://mastodon.online/users/ThreeSigma",
"to": [
"https://www.w3.org/ns/activitystreams#Public"
],
"cc": [
"https://mastodon.online/users/ThreeSigma/followers",
"https://mastodon.online/users/KilleansRow"
],
"sensitive": false,
"atomUri": "https://mastodon.online/users/ThreeSigma/statuses/114280518249920393",
"inReplyToAtomUri": "https://mastodon.online/users/KilleansRow/statuses/114266367157114219",
"conversation": "tag:mastodon.online,2025-03-31:objectId=485431063:objectType=Conversation",
"content": "<p><span class=\"h-card\" translate=\"no\"><a href=\"https://mastodon.online/@KilleansRow\" class=\"u-url mention\">@<span>KilleansRow</span></a></span> <br />If it's not tested with experiment, then the theory isn't even wrong, it's pointless. Observations are fine (providing it's predicting, not post-hoc), but you need to be dealing with physical reality, not just principles and math.</p><p>If you can't build the experiment, there's little point in building the theory.</p>",
"contentMap": {
"en": "<p><span class=\"h-card\" translate=\"no\"><a href=\"https://mastodon.online/@KilleansRow\" class=\"u-url mention\">@<span>KilleansRow</span></a></span> <br />If it's not tested with experiment, then the theory isn't even wrong, it's pointless. Observations are fine (providing it's predicting, not post-hoc), but you need to be dealing with physical reality, not just principles and math.</p><p>If you can't build the experiment, there's little point in building the theory.</p>"
},
"attachment": [],
"tag": [
{
"type": "Mention",
"href": "https://mastodon.online/users/KilleansRow",
"name": "@KilleansRow"
}
],
"replies": {
"id": "https://mastodon.online/users/ThreeSigma/statuses/114280518249920393/replies",
"type": "Collection",
"first": {
"type": "CollectionPage",
"next": "https://mastodon.online/users/ThreeSigma/statuses/114280518249920393/replies?only_other_accounts=true&page=true",
"partOf": "https://mastodon.online/users/ThreeSigma/statuses/114280518249920393/replies",
"items": []
}
},
"likes": {
"id": "https://mastodon.online/users/ThreeSigma/statuses/114280518249920393/likes",
"type": "Collection",
"totalItems": 0
},
"shares": {
"id": "https://mastodon.online/users/ThreeSigma/statuses/114280518249920393/shares",
"type": "Collection",
"totalItems": 0
}
}