Bluesky
Bluesky character limit and media specs
| Post length | 300 characters |
| Images per post | 4 |
| Image size | 1 MB (recompressed client-side) |
| Video length | 3 minutes |
| Alt text | 2,000 characters |
Platform limits change — verify against the official docs before betting a campaign on one.
Good to know
Bluesky counts graphemes, not bytes — emoji count as one character. Longer drafts can post as a thread chain.
/ — over by
SawirPost's composer counts against each network's limit as you type — and when a draft runs over on Bluesky, it can split into a thread at word boundaries instead of getting cut off.