Write YouTube titles & descriptions in your voice.
Upload your Short or video and Captiv writes the title, description, and hashtags for you — hook-first, on-brand, and ready to post in about ten seconds.
Free to start · no login · Shorts & long-form video
An AI YouTube caption generator that actually sounds like you.
Captiv is an AI YouTube caption generator: you upload a finished Short or video, and it watches what’s actually on screen and writes three options — a hook, a story, and a value angle — each with a title, description, and a tuned set of hashtags, in about ten seconds. Every one is written for how YouTube actually works: a title that earns the click, and keywords in the title and description that help you get found in search.
Titles are how YouTube finds your video.
YouTube can’t read your mind — when someone searches, it reads your words. Its own guidance is specific: to judge relevance, it looks at how well your title, tags, description, and video content match the search query. And YouTube says your title and description do more for discovery than your tags, which play only a minimal role. So the words you put there are the difference between a video people find and one they never do.
And search reaches past your subscribers. The same words let people who don’t follow you yet find the video when they go looking for what you posted about — long after it’s scrolled out of subscribers’ feeds. YouTube doesn’t sell better placement in organic search, so a clear, keyword-true title and description is how you actually earn it.
Three steps. About ten seconds.
No prompt-wrangling — Captiv works from the video you already made.
Drop in your Short or video
A vertical Short or a long-form video. Nothing to fill out — just the finished upload.
Captiv watches it
Its AI looks at what’s actually on screen — the scene, subject, and vibe — so the title and description are about your actual video.
Get 3 titles + descriptions
Hook, story, and value angles, each with a title, description, and focused hashtag set. Edit inline and copy the one you love.
Titles & descriptions built for the search bar.
A title that earns the click
The title is the whole click. Captiv leads with a hook that makes people stop and tap — not a flat description of what they’re about to watch.
Smart hashtag mix
A focused set of relevant hashtags for your title and description — never the 60-tag pileup that makes YouTube ignore every hashtag on the video.
Sounds like you
A voice profile learns how you actually write — your rhythm, your emojis (or none) — so your titles and descriptions never read like generic AI.
Shorts & long-form
Captiv reads vertical Shorts and long-form video alike, and tunes the title, description length, and hashtags to the format you’re posting.
Three angles, every time
Hook, story, or value — pick the one that fits the video or your mood instead of settling for one guess.
Ten seconds, not ten minutes
Stop staring at the empty title box. Post more, and post consistently, without the daily bottleneck.
YouTube titles & descriptions, answered.
Is Captiv a free YouTube caption generator?
Yes. You can generate 3 titles and descriptions with no login, then 5 a month free with an account. Paid plans add voice matching, video and carousel analysis, and higher monthly limits.
How does the YouTube title and description generator work?
Upload your finished Short or video. Captiv’s AI looks at what’s actually on screen, then writes three options — a hook, a story, and a value angle — each with a title, description, and hashtags, in about ten seconds. You edit inline and copy the one you like.
How many hashtags should a YouTube video have?
Captiv adds a focused mix of relevant hashtags rather than a random pile. It matters: YouTube shows up to three of your most-engaging hashtags above the title, and if a video has more than 60 hashtags it ignores every one of them — so a tight set beats stuffing.
Can it write titles in my own voice?
Yes. On Pro, Captiv learns your voice from the titles and descriptions you keep and edit, so every one sounds like your channel rather than generic AI. On the free plan it uses a clean, platform-native voice.
Does it work for Shorts and long-form videos, not just one?
Yes. Captiv reads vertical Shorts and long-form video alike, and tunes the title, description length, and hashtags to the format you’re posting.
Your next upload
deserves a better title.
Generate three, in your voice, in about ten seconds. Free to start.
Generate my caption — freeNo login required · works on Shorts & long-form video