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Is there a free AI tool that writes social captions from a photo?
Yes. You can try it without an account: upload a photo, pick Instagram, TikTok or LinkedIn, and get 3 caption variations with hashtags. The no-account try gives one set. A free account starts with 20 sign-up credits that pay for caption runs in the app; credit packs start at $2.49. Inflyu reads the photo itself, so you do not type a description.
How do I write social media captions from a photo?
- Upload a photo. A JPG, PNG or WebP works; the page scales it down before it is sent.
- Pick the platform. Instagram, TikTok or LinkedIn, which changes the hook, the hashtags and the closing line.
- Generate. The tool first describes what the photo shows, then writes 3 caption variations with hashtags.
- Copy the one you like. Each variation is short, medium or long and copies with its hashtags in one tap.
What is the best free AI caption generator for Instagram and TikTok?
It depends on what you start from. In this comparison, Hootsuite, Social Champ and Vaizle take a typed description and are free to use, and the Canva page could not be read. Inflyu writes from the photo itself, with a first set of 3 captions before any sign-up and 20 sign-up credits on a free account.
| Tool | Free to try | Works on your own photo | Needs a card | Output limit | Entry price | Bad at |
|---|---|---|---|---|---|---|
| Inflyu | No account for a first set of captions; 20 sign-up credits with a free account for caption runs in the app; packs from $2.49 | Yes, you upload your own photo | No card to sign up. Packs are paid at checkout. | 3 caption variations with hashtags per photo, for Instagram, TikTok or LinkedIn | Credit packs from $2.49, no subscription | It writes from one photo, so it cannot use details the photo does not show; a photo with no clear subject gives it less to write about |
| Canva | Not stated | Not stated | Not stated | Not stated | Not stated | Not stated |
| Hootsuite | Labelled 'FREE TOOL' | No: takes a typed description (network, tone, language, short description and keywords), not an image | Not stated | Not stated | Not stated | Page warns the tool may display inaccurate or offensive material |
| Social Champ | Free, 'no cap' on captions | No: takes a typed description (platform, style, language, description and keywords), not an image | No (stated for the platform trial banner) | Not stated | Not stated | Page warns output may include inappropriate themes |
| Vaizle | Free, no registration or sign-up, no limits | No: takes a typed description (platform, category, tone and short description), not an image | Not stated | Not stated | Not stated | Not stated |
Competitor facts come from each tool's own page, checked 1 Nov 2026.
Canva alternative for writing social captions from a photo
The Canva page fetched for this comparison returned an access error on 1 Nov 2026, so this page states no Canva facts. The other tools in the table (Hootsuite, Social Champ and Vaizle) take a typed description, and Social Champ and Vaizle say their tools are free. Inflyu reads the photo itself and writes 3 variations for Instagram, TikTok or LinkedIn, with a first set before any sign-up and 20 sign-up credits on a free account. Pick a typed-description tool when you have no photo. Pick Inflyu when the photo is the post.
Compare with Canva on its own page.
What are the limits of an AI caption generator?
It writes from one photo and cannot use details the photo does not show, so a photo with no clear subject gives weaker captions. It covers Instagram, TikTok and LinkedIn, gives 3 variations per run, and the no-account try gives one set before it asks you to sign up.
Limits today
- Input: one photo (JPG, PNG or WebP); the no-account page scales it down before it is sent.
- Platforms: Instagram, TikTok and LinkedIn.
- Output: 3 variations with hashtags per run; the no-account try gives one set and then asks you to sign up.
- Credits: 20 sign-up credits with a free account to spend on caption runs in the app.
What works best
- A clear photo with an obvious subject, setting and mood, because the captions are written from what the photo shows.
- Pick the platform before you generate, because the hook, the hashtag count and the closing line change with it.
- Treat the 3 variations as drafts and add your own details, such as a place or a name.
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