Write Threads posts in your voice.
Upload the photo, carousel, or video you’re about to share. Captiv reads what’s actually in it and writes three Threads posts — a hook, a story, and a value angle — ready to post in about ten seconds.
Free to start · no login · photos, carousels & video
An AI Threads caption generator that sounds like you.
Captiv is an AI Threads caption generator: you upload a finished photo, carousel, or video, and it looks at what’s in the media, then writes three post options — a hook angle, a story angle, and a value angle — each with a tuned topic tag and a one-line why, in about ten seconds, tuned to how Threads reads. You edit inline and copy the one you like. Captiv doesn’t post or schedule for you.
What you write is how Threads finds your post.
Threads doesn’t show your post in one fixed order. The default feed is an AI blend of the accounts someone follows and posts it recommends, ordered by what the system predicts they’ll actually engage with — so the post that earns replies and likes is the one it carries further.
The other door is search. When someone types a keyword or taps a topic, Threads matches it against the words in real posts. Captiv writes a post worth engaging with and tags it with the one topic that makes it findable — no keyword stuffing, no pile of hashtags.
Three steps. About ten seconds.
No prompt-wrangling — Captiv works from the post you already made.
Drop in your post
Upload the photo, carousel, or video you’re about to share on Threads. No brief, and no login to start.
Captiv reads it
The AI looks at what’s actually in your media — the scene, the subject, the mood — not just a filename or a guess.
Get 3 posts + a topic
Three angles — hook, story, value — each with a fitting topic tag and a one-line why. Edit inline, copy the one you like.
Built for how Threads works.
Hook-first
Every option opens with a line built to stop the scroll, because the feed carries the posts people actually stop on and engage with.
One smart topic
Threads allows one topic tag per post and the # is optional, so Captiv picks the single tag that fits — not a stack of hashtags.
Sounds like you
On paid plans Captiv learns your voice from the posts you keep and edit, so captions read like you wrote them, not a bot.
Every format
Photos, carousels, and video all get read and captioned, tuned to how they land on Threads.
Three angles
A hook angle, a story angle, and a value angle every time, so you pick the take instead of facing a blank box.
About ten seconds
Upload to three ready-to-post options in roughly ten seconds, each with a one-line why so you know what you’re choosing.
Threads posts, answered.
Is the Threads caption generator free?
Yes. You get 3 posts with no login, then 5 a month free with an account. Pro is $15/mo for voice matching, video and carousel analysis, and higher limits; Studio is $35/mo for 5× Pro.
How does the Threads caption generator work?
Upload a finished photo, carousel, or video. Captiv’s AI looks at what’s actually in it and writes three post options — hook, story, and value — each with a topic tag and a one-line why, in about ten seconds.
How many hashtags should I use on Threads?
Threads allows one topic per post and the # symbol is optional. Captiv gives each option a single tuned topic tag instead of a stack of hashtags, matching how Threads actually works.
Can it write Threads posts in my own voice?
On paid plans, yes. Captiv learns your voice from the posts you keep and edit so captions sound like you. The free plan uses a clean, Threads-native voice.
Does it work for photos and video?
Yes. Captiv reads photos, carousels, and video. Voice matching plus video and carousel analysis are on the Pro and Studio plans.
Your next Threads post,
written in ten seconds.
Upload a photo, carousel, or video and get three ready-to-post options — hook, story, and value — in your voice.
Generate my caption — freeFree to start · no login · 3 posts on the house