Platforms count text differently: X counts every link as 23 and an emoji as 2, Bluesky counts what you see, TikTok counts most emoji as 2. The composer counts each one the platform's way. Try it with the free character counter.
| Platform | Post text | Other fields |
|---|
| X | 280, or 25,000 with X Premium | Each tweet of a thread has its own 280 |
| Instagram | 2,200 | First comment 2,200 |
| Facebook | 63,206 | |
| LinkedIn | 3,000 | |
| TikTok | Video caption 2,200 | Photo title 90, description 4,000 |
| YouTube | Description 5,000 bytes | Title 100 |
| Threads | 500 | |
| Bluesky | 300 | |
- Instagram and TikTok need a photo or a video. An Instagram carousel takes 2 to 10 photos.
- YouTube needs a video.
- Every other platform takes text on its own, or with photos or a video.
- One post carries photos or a video, never both, because no platform takes a mix.
X
Write a thread, add a poll, choose who can reply, post into a Community, or give X its own text. Long posts need X Premium on your account.
Instagram
Give Instagram its own caption, tag people and collaborators, and add a first comment, which goes up as soon as the post is live.
TikTok
TikTok asks every app to show its choices in a set order, and Postatron does: your TikTok name, a privacy level (nothing is chosen for you), whether to allow comments, Duets and Stitches (none ticked), and whether the post promotes a brand. Or tick Save to TikTok inbox as draft and finish it in the TikTok app.
YouTube
Set the title, description, privacy (public, unlisted or private), tags, category and a custom thumbnail. YouTube asks every uploader whether a video is made for children, so the composer always asks too. Custom thumbnails need a channel YouTube has verified.
Bluesky and Threads
Text with photos or a video. Links become cards the way each platform shows them.