Free Image Caption Generator with Hashtags
Turn a photo into a caption and a set of hashtags for your platform, using the AI built into your browser. Nothing is uploaded.
0 images sent anywhereEverything runs on this device. Your images never leave this computer.
Needs desktop Chrome (Windows, macOS, Linux or ChromeOS). On a phone or another browser, open this page on your computer. Chrome downloads its AI model once, which varies in size and needs about 22 GB of free disk space.
How it works
Add your photos and pick the platform you are posting to. The tool passes each image to the AI built into Chrome, which runs on your device, so unreleased photos and client work stay with you.
It writes a caption from what is actually in the picture and suggests hashtags that match. Choose how many hashtags you want, from 5 to 20, or switch them off. A cleanup check removes duplicates, stray symbols and tags that are too long.
Edit the caption in your own voice, then copy the caption, the hashtags, or both together. Because it runs locally there is no limit on how many photos you try, so generate a few variations and keep the one that fits.
The first time you use it, Chrome downloads its on-device AI model. The download size varies, and Chrome needs about 22 GB of free disk space to install it. The model is shared by every site that uses it, so you only set it up once. It needs desktop Google Chrome (Windows, macOS, Linux or ChromeOS) with its built-in AI available. Phones and other browsers are not supported yet.
What the image caption generator does
- Writes a caption and hashtags together; the description is optional.
- Platform picker for Instagram, TikTok, LinkedIn, X and Pinterest.
- Choose 5, 10, 15 or 20 hashtags, or turn them off.
- Hashtag cleanup: no duplicates, no spaces, no stray punctuation.
- Copy caption, hashtags or both in one click.
Example results
Real examples of what this preset writes. Results are drafts: read them and edit before you publish.
sourdough-loaf.jpg
Example photo: A freshly baked sourdough loaf with a deep scored crust, cooling on a wire rack.
CaptionCrackling crust, soft crumb. Fresh out of the oven this morning.Hashtags- #sourdough
- #homebaking
- #breadlover
- #artisanbread
- #freshlybaked
Instagram, 5 hashtags: a short caption and tags that match the picture.
keynote-stage.jpg
Example photo: A speaker on a stage in front of a large screen at a conference, with an audience in the foreground.
CaptionGreat energy at today's keynote. Thank you to everyone who joined the session and asked such sharp questions.Hashtags- #keynote
- #conference
- #publicspeaking
- #leadership
- #learning
LinkedIn: a more professional tone and fewer, broader tags.
trail-sunrise.jpg
Example photo: A hiker standing on a mountain ridge at sunrise looking over a valley full of mist.
CaptionWorth the early alarm. Mist in the valley and the whole ridge to ourselves.Hashtags- #sunrisehike
- #mountains
- #trailrunning
- #outdooradventure
- #morningmist
TikTok: casual, first-person, scene-based tags.
Frequently asked questions
Which platforms are supported?
You can pick Instagram, TikTok, LinkedIn, X or Pinterest. The platform changes the number and style of hashtags suggested. Captions are written to be editable on any platform.
How many hashtags should I use?
It depends on the platform and your audience. A handful of relevant tags usually beats a long list. Choose 5, 10, 15 or 20 here and trim the list by hand.
Will the captions sound like me?
They are neutral drafts. Edit them in your own voice. The page context box lets you add a line such as 'launch post for our bakery' so the caption leans the right way.
Can I use it for photos that are not public yet?
Yes, that is one of the reasons to use an on-device tool. Your images never leave this device, so unreleased products, client work and personal photos are not sent to a caption service.
Are there limits on how many captions I can generate?
No credits and no daily cap. The only limit is how fast your own computer can run the model, so large batches take longer on older machines.
Why is the tool not working on my phone?
The AI is built into desktop Chrome and is not available on phones or other browsers yet. Open the page on a computer; the examples below show the kind of captions you would get.