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Free AI Threads Caption Generator
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Free AI Threads Caption Generator

Upload your image, pick a tone, and get a Threads post written to be answered, not just read. Built by Cloud Campaign, the social media platform for agencies.

e.g. Screenshot of our client's new app onboarding flow, asking what people think of the first screen
threads

Free to use · No account needed · Add your email to have your captions sent to you

Writing these for clients every week? Cloud Campaign schedules and publishes to Threads. Try it free for 14 days

How to generate Threads posts

1

Upload the photo or graphic

Drop in the image for the post if you have one. The generator analyzes it and writes from what it sees, so a written prompt is optional. A line of context makes the caption sharper.

2

Add the website and pick platforms

Paste the brand's website URL and the generator pulls extra context for a more precise brand voice. Then select every platform you want a caption for.

3

Set tone, length, hashtags, and emojis

Choose a tone and a length, then set how you want hashtags and emojis handled. The generator follows those preferences on every platform.

4

Get one caption per platform

A caption tailored to each platform you selected appears in seconds. Add your email if you want them sent to you so nothing gets lost.

How to write Threads posts that get replies

Write the way you would reply

Threads rewards conversation over broadcast. A post that reads like the first message in a group chat gets more replies than one that reads like an announcement.

One tag, chosen carefully

Threads allows a single topic tag per post and it acts like a category, not a hashtag pile. Pick the community you want the post filed under.

Leave room for the reply

Do not close every loop. A post that states an opinion and stops invites people to finish the thought, which is exactly what the algorithm is watching for.

Threads post limits at a glance

Maximum post length

500 characters

Truncation

None; the full post shows in feed

Engagement sweet spot

Under 200 characters, conversational

Tag limit

One topic tag per post

What performs

Replies and quotes; write to be answered

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Questions, answered

Is the Threads caption generator really free?

Yes. It's free to use and there is nothing to install. Generate your first posts without an account; after that we ask for an email address so you can keep going. It's built by the team behind Cloud Campaign, the social media platform for agencies.

How long should a Threads post be?

Threads allows 500 characters and shows the whole post in feed, so there is no “more” to fight. Posts under 200 characters that read like a message to a friend get the most replies, so the generator defaults to short and conversational.

Does Threads use hashtags?

Threads uses a single topic tag per post instead of hashtags, and it works like a category. The generator suggests one tag that fits the community you want the post filed under.

Will an AI post hurt my Threads reach?

No. Threads ranks on replies and quotes, not on who wrote the post. What hurts is broadcast-style copy, which is why the generator writes in a conversational voice and leaves room for people to answer.

Can it match my client's voice?

Yes. Add the client's website and the generator uses it to build a more precise brand voice, then choose the tone that fits the account. It's built for agencies writing as multiple clients.

Can it write posts that get replies?

Yes. Pick a casual tone and the generator writes the post the way you would reply in a group chat, with an opinion or a question that invites a response rather than a polished announcement.

More free tools from Cloud Campaign

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