Field notes
Playbooks, teardowns and the occasional argument — everything we have learned helping creators grow across every major platform.
Spotify publishes album and artist images at 640, 300 and 64 pixels. There is no original behind the 640 — every 'HD Spotify cover art' result is upscaling the same file.
Apple's public directory hands out a 600-pixel copy. The 3000×3000 the publisher submitted is at the same address with one number changed.
Upload a square image of at least 600×600. That is also the largest Twitch stores — and the page only ever publishes the 300, which is why avatars look soft when reused.
Alt text is read by people, not just crawlers. Where each platform hides the field, what a good description does, and why reused images lose theirs.
The picture rendered fine when you pasted it and is a broken icon now. The expiry was in the URL the whole time — here is how to read it.
Bluesky is the one platform that will simply tell you what is on a post. You get every image, the alt text, and the file exactly as it was uploaded.
Threads answers a signed-out request honestly, which makes it one of the easier platforms to get a picture out of. Two details are worth knowing first.
Two different links, two different routes. A post gives you what its link card publishes; a Page gives you its picture at the size Facebook stores.
Instagram publishes a larger copy of every public post's picture so link cards can render it. Here is how to reach it, and why the link stops working.
X keeps one file per photo and serves it at six named sizes. The timeline shows you a middling one; the largest is a single word away in the URL.
Every platform publishes a larger copy of a post's picture than the one the feed renders. Here is where each one keeps it, and where the trail goes cold.