Instagram

Connect

Instagram only lets apps publish to professional accounts, so your account must be a Business or Creator account. Switching is free: in the Instagram app, open Settings → Account type and tools → Switch to professional account.

Then choose Instagram under Settings → Channels → Connect and sign in with Instagram. You don't need a Facebook Page.

What you can post

Choose the format on the channel's copy:

Post: one image or video, or a carousel of up to ten.
Reel: one video.
Story: one image or video. Stories publish no caption, so the text is ignored.

Every Instagram post needs at least one image or video.

Options

Tag people on photos, or name the people in a video. Only public accounts can be tagged.
Collaborators: invite up to three accounts to co-author the post (not on Stories).
Cover for a Reel: a frame from the video, or your own image.
AI info: Instagram's label for AI-generated content (not on Stories).

Inbox, analytics and engagement

Inbox: comments on your posts, which arrive within moments.
Analytics: views, likes, comments, saves and shares per post, and follower counts.

Limits

Limit	Value
Text	2,200 characters
Threads	No
Attachments	Up to 10 per post, at least one is required
Images	Up to 7.6 MB
Video	Up to 286.1 MB, 3s to 15 min long, at least 23 fps
Aspect ratio	0.8 to 1.91 (width ÷ height); every carousel slide is cropped to the first one's shape
GIF search	No
File types	jpeg, png, mp4, quicktime
Formats	Post, Story, Reel
Polls	No
Quote posts	No
Reply to an existing post	No
Link previews	No
Auto-engagement	No
AI-generated label	Yes

Good to know

Aspect ratio. Images must be between 4:5 portrait and 1.91:1 landscape, and every carousel slide is cropped to the first slide's shape. The composer offers Crop to fit.
Five hashtags. Instagram refuses a feed post or Reel with six or more.
Frame rate. Video under 23 frames per second is refused.
Links in captions aren't clickable. Use your link in bio.