Instagram

Switching is free and takes a moment in the Instagram app: Settings → Account type and tools → Switch to professional account. Single image — publishes as a normal post. Must be JPEG; PNG and WebP are refused by Instagram. Single video — publishes as a Reel. That is Instagram's own behaviour, not a choice Chirio makes. 2–10 items — a carousel, in the order you send them. Video items are allowed alongside images. If any single item fails to process, the whole target fails — there is no partial carousel. See Carousels. Media is fetched by Instagram from the URL you provide, so it must stay publicly reachable until the call returns. Instagram takes the first frame of a video as its cover unless you say otherwise, which is why a reel so often opens on a blurred or half-drawn still. Two ways to change it, both set on the media item: coverUrl wins when both are sent — Instagram ignores the offset in that case, so Chirio drops it rather than send a parameter that does nothing. A cover image must be JPEG, 8 MB or less, sRGB. Aspect ratio should be 9:16: an off-ratio cover is not rejected, it is cropped — Instagram takes the middle 9:16 rectangle for the Reels tab and the middle 1:1 square for the feed, so anything important near an edge is lost. Images take altText — up to 1,000 characters of screen-reader description, set per media item, so each image in a carousel describes itself rather than sharing one line. Reels and stories take none: Instagram supports the field on images only. Set aiGenerated: true on an Instagram target and Chirio sends Meta's self-disclosure, which Instagram surfaces as its own label. On a carousel it rides the parent container — Meta refuses it on children, so there is nothing to set per item.