Free AI caption generator
Describe your post, pick a platform, and get a ready-to-use caption in seconds — the same AI that powers Orbin's full platform.
Three steps, no account needed
Describe your post
Tell the tool what you're posting about — a sale, an announcement, a tip, anything.
Pick a platform and tone
Choose the network you're posting to and, optionally, a tone like friendly or professional.
Get your caption
Claude writes a ready-to-post caption tailored to that platform's style and length in a few seconds.
Frequently asked questions
Is this really free?+
Yes — a handful of free generations per day, no account or credit card required. It's a preview of the AI that powers Orbin's full platform.
What's the difference between this and Orbin?+
This tool writes a single caption on demand. Orbin adds your brand voice, generates and schedules content across your connected networks from one calendar, predicts engagement before you post, and can even run on autopilot.
Which platforms are supported?+
Facebook, Instagram, X, LinkedIn, Pinterest, TikTok, YouTube, and Threads — pick one and the caption is tailored to that platform's style and length conventions. Orbin itself publishes to Facebook, Instagram, X, and LinkedIn; Pinterest, TikTok, YouTube, and Threads publishing is coming soon.
Do you store what I type?+
Your prompt is sent to Claude to generate a caption and isn't tied to an account, since you're not signed in. See our Privacy Policy for details.
Try another free tool
Do more with Orbin
- AI Content StudioDraft captions, generate images and text cards, improve copy, and plan a content strategy in one workspace, powered by Claude and tuned to your brand voice.Learn more
- Engagement PredictionScore a draft post from 0 to 100 and see estimated likes, comments and shares before you publish, with insights and suggestions to improve it.Learn more
- Content CalendarPlan every post on a month, week or day calendar. Filter by network, drag to reschedule, and see drafts, scheduled and published posts in one place.Learn more
Like what you see?
Orbin writes in your brand voice, schedules across your connected networks, and predicts engagement before you post — all from one calendar.
Start free trial