How it works
What goes in and what comes out
You say what the post is about and add the facts, links or call to action it must include. An AI model (Llama 3.1 8B, run on Cloudflare Workers AI) writes three different Instagram captions in the tone, length and language (English or Vietnamese) you choose. Each draft has its own copy button, and "Write new drafts" asks again with the same brief.
The prompt describes how people write on Instagram: A hook in the first line, a short story or tip, a call to action, then a line of three to eight relevant hashtags (Instagram allows up to 30). Emoji are natural.
Length
Instagram allows up to 2,200 characters in a caption (as of 2026). Each draft shows its count against that limit and is marked if it runs over, so you can trim it.
Short, Medium and Long aim for about 100–250, 250–600 and 600–1,200 characters, within any limit.
