AI social media caption generator
Describe your post and platform and get a prompt for a native-feeling caption with a strong hook and the right hashtags.
How it works
Describe it
Say what you need in plain words — no prompt-engineering knowledge required.
Get a pro prompt
A structured Role · Objective · Context · Format prompt, built for this task.
Use it anywhere
Paste into any AI, refine in chat, or hear it read aloud.
What you can create
An Instagram caption with 8 hashtags
Get a ready-to-use prompt for an Instagram caption with 8 hashtags.
A punchy X post
Get a ready-to-use prompt for a punchy X post.
A TikTok hook
Get a ready-to-use prompt for a TikTok hook.
Why it works
- Platform-native voice and length
- Strong first-line hook
- Relevant, non-spammy hashtags
Powered by the Social Spark agent
Viral social-media content. Meet Social Spark →
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FAQ
Is the AI social media caption generator free?
Yes — LLM Prompt Gen gives you 20 free credits every month, no credit card required.
Which AI models does it work with?
The generated prompt works in ChatGPT, Claude, Gemini and any other LLM.
Do I need to know prompt engineering?
No. Describe what you want in plain words and the engine builds the structured prompt for you.
