A field guide for every platform you post to.
Specs, timing, and the mistakes to skip, one guide per platform. Free to read, free to save, and free to hand to your AI assistant.
Instagram
Caption up to 2,200 characters, but only about 125 show before "more", so lead with the hook.
TikTok
Vertical video with a hook in the first second or two is the whole game.
YouTube
The title and thumbnail are the real hook on long-form, and you decide them before you shoot, not after.
X
280 characters by default, longer if you are on Premium. Write tight, and make the first line carry the whole point.
LinkedIn
Document carousels (PDF) and genuine first-person insight travel furthest.
Facebook
Reels carry most of the organic reach now; short vertical video is your front door to new people.
Threads
500 characters per post, text-first. Say one thing, and say it so someone wants to answer.
Bluesky
300 characters, a tight budget. Write to it, do not trim to it.
Pinterest
Pinterest is a search engine, not a feed. Keywords beat hashtags, and the words you choose are how new people find you.
Reddit
Reddit is many small communities, not one feed. Post to the subreddits that actually fit your topic.
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