Threads Caption Generator
Tell it what the post is about (a sentence is enough) choose a tone and you get five captions to pick from. Threads posts are short by design (500 characters) and the feed rewards replies more than likes. Opinions, questions and one-liners do better than announcements. Edit anything, copy it, or schedule it straight to Threads.
Results come from Claude, tuned per platform. Edit them: the best version is the one that sounds like you. We do not store what you type.
What makes a good Threads caption
Threads posts are short by design (500 characters) and the feed rewards replies more than likes. Opinions, questions and one-liners do better than announcements.
Threads replaced hashtags with a single topic tag per post, without the # sign. Pick the one tag people actually browse.
How to get better results
- Give a specific brief: "our spring menu, launching Monday, photo of the pistachio croissant" beats "food post".
- Name the audience if it matters: "for first-time home buyers", "for dentists".
- Put must-include words (a product name, a discount code, a link) in the "anything to include" field.
- Pick the caption that sounds most like you and cut the rest. Generated captions are a starting point, not the post.
Frequently asked questions
Is the caption generator free?
Yes. Ten generations a day without an account, and unlimited inside Social by InstantDM's composer.
Which AI does it use?
Claude, with a prompt written for each platform's length and style.
Do you store what I type?
No. The brief is sent to generate the captions and is not saved.
How long should a Threads caption be?
Up to 500 characters, but shorter is better.
Related free tools
Write it here, publish it everywhere
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