Every network sets its own limits. The composer checks your post against them as you write, so you will see a warning before you schedule rather than a failed post afterwards. This page lists the same limits the composer uses.
Text length and threads
| Network | Characters per post | Threads |
|---|---|---|
| X | 280 | Yes |
| 3,000 | No | |
| LinkedIn Page | 3,000 | No |
| 2,200 | No | |
| TikTok | 2,200 | No |
| YouTube | 100 in the title, 5,000 in the description | No |
| Threads | 500 | Yes |
| 63,206 | No | |
| Bluesky | 300 | Yes |
A few networks count characters in their own way, and the composer counts the same way they do:
- X counts every link as 23 characters however long it is, and counts some characters, such as many emoji and Chinese, Japanese and Korean characters, as two.
- Bluesky counts each emoji as one character, including emoji made of several joined together.
On networks that support threads, each post in the thread has its own limit. See Post a thread.
Images and videos by type of post
Where a network offers more than one type of post, such as Instagram reels and stories, you choose the type in that network's section of the composer.
X
- Post: Text only, or up to 4 images, or 1 video
- Post: Text only, or up to 20 images, or 1 video
LinkedIn Page
- Post: Text only, or up to 20 images, or 1 video
- Image: 1 image
- Carousel: 2 to 10 images or videos, mixed however you like
- Reel: 1 video
- Story: 1 image, or 1 video
TikTok
- Video: 1 video
YouTube
- Short: 1 video
Threads
- Post: Text only, or up to 20 images or videos, mixed however you like
- Image: 1 image
- Carousel: 2 to 10 images
- Video: 1 video
- Reel: 1 video
Bluesky
- Post: Text only, or up to 4 images, or 1 video
Rules the composer cannot check
Some limits depend on the file itself: video length, resolution, aspect ratio and file size. These vary by network and change more often than the limits above. Fluxi cannot always check them before publishing, so a post that breaks one fails with the network's reason. See Why did my post fail? for how to fix and retry it.