Free AI toolAI caption generator.Captions for posts, not video subtitles.
Describe your post, pick the network and a tone: Claude writes 3 captions that follow that network's rules, and shows each one in a real post preview. Free, no sign-up.
Network
Tone
Free, no sign-up. Written by Claude.
northbeam.coffee
northbeam.coffee We finally nailed it. Our new Morning Light roast drops tomorrow, and it tastes like honey and orange in your cup. If you've been waiting for something brighter, this is it. Grab yours tomorrow morning. #MorningLight #LightRoast #CoffeeAddict #SpecialtyCoffee
Example for “New light roast called Morning Light, honey and orange notes, out tomorrow”
Limit: 2,200 characters
How to use the AI caption generator
- 1. Say what the post is aboutOne or two sentences with the specifics: the product, the offer, the date, the detail only you know. The more concrete, the better the captions.
- 2. Pick the network and a toneThe network sets the length and the hashtag rule; the tone sets the voice.
- 3. Pick one and edit itClick a caption to see it in the post preview, copy it, and change one detail to make it yours.
It writes in the language you type in: describe the post in French, you get French captions.
What makes a caption work
- The first lineMost feeds only show the start of a caption before "more". The first line has to earn the tap: a claim, a question, a surprising detail.
- One ideaOne post, one message. A caption that announces a product, a hiring and an event gets none of them read.
- One call to actionAsk for one thing: a comment, a save, a click on the link in your bio, a visit.
- A specific detail"Honey and orange notes" beats "delicious coffee". Specifics are what make a caption sound like you and not like a template.
Caption limits by network
| Network | Caption limit | Hashtags | Source |
|---|---|---|---|
| 2,200 characters | Up to 5 per post | Instagram Help, Meta API | |
| TikTok | 2,200 characters through the API | No official number | TikTok for Developers |
| Threads | 500 characters | No official number | Threads API |
| X | 280 characters on a free account | One or two at most, by habit | X |
LinkedIn and Facebook allow much longer posts; what counts there is the first two or three lines, the part people see before they expand the post.
BreakreachFound the one? Schedule it. Breakreach publishes your caption to Instagram, TikTok, LinkedIn, X and eight more networks at the time you pick. Or skip the copy and paste: ask ChatGPT or Claude to write and schedule it with the Breakreach connector.
Schedule this captionSix caption formulas
- Hook, story, call to actionA first line that stops the scroll, two lines of what happened, one ask.
- The list"3 ways to brew it": numbered lines are easy to read on a phone.
- The questionOpen with the question your audience asks you most, answer it in two lines, ask theirs.
- Before and afterWhat it was like, what changed, what it means for the reader.
- Behind the scenesThe 6am roast, the failed batch, the team. People follow people.
- The announcementWhat, when, where, and why it matters to the reader, in that order.
Each tone in the generator leans on a different formula, which is why the three captions don't read the same.
Make AI captions sound like you
The captions are a first draft. Two minutes of editing is the difference between a post that sounds written by a person and one that sounds generated:
- Cut the clichés"Game-changer", "elevate", "dive in". The generator avoids them; delete any that slip through.
- Add one thing only you knowA number, a name, a place, what went wrong first.
- Read it out loudIf you wouldn't say it to a customer, rewrite that line.
Questions, answered.
About the ai caption generator and what it writes.
Yes, with no sign-up. You can run it a dozen times an hour. For more, sign up and use the Breakreach assistant, which writes and schedules posts from inside the app.
Claude, Anthropic's model, with instructions for each network: length, first line, hashtags and tone.
No. It writes the text that goes with a post. For subtitles burned into a video, use a video editor's auto-captions.
It follows the network: 3 to 5 on Instagram, where 5 is now the maximum per post, a few on TikTok, at most 3 on LinkedIn, and one or none on Threads.
Yes. Describe the post in the language you want, and the captions come back in it.
It already knows each network's rules and shows the caption in a real post preview. And with the Breakreach connector, ChatGPT or Claude can write and schedule the post themselves.
Yes. Breakreach publishes to Instagram, TikTok, LinkedIn, X, Facebook, Threads and six more networks at the time you pick.
What moves reach is how people react to the post. Edit the draft so it sounds like you, with one detail only you know, and it reads like anything else you write.
Put your socials on autopilot.Live in two minutes.
Plans from $29 a month. Cancel anytime.