MotionShine01 / Describe
A line about the post
What is in the photo or reel, and why you are posting it.
Free tool
Instagram captions, in your style.
Say what your post is about, pick a style and a call to action, and get captions to copy: fun, inspiring, professional, short, a little story, or a question that gets comments. Where Chrome's built-in AI runs on your computer, it writes fresh ones about your exact post. Star the ones you like to keep them for later.
Checking for Chrome's built-in AI...
Your saved captions
A good caption
Put the hook in the first line, sound like yourself, and ask for one thing. Add your hashtags at the end: Instagram allows up to 5 on a post. Make them with the hashtag generator.
Captions are made in your browser. Nothing you type is sent anywhere.
How it works
Your post, six ways to say it.
02 / Style
Pick a voice
Six styles, each with its own lines and emoji, plus the call to action you want.
03 / Copy
Edit and post
Copy a caption, make it yours, and star the good ones to keep them in this browser.
Questions
Good to know.
How long can an Instagram caption be?
Meta's developer documentation gives 2,200 characters for a caption, read on 17 October 2026. Each caption here shows its length against that.
How does the AI work here?
On computers where Chrome's built-in AI is available, Chrome writes the captions on your computer; the first time it downloads its model once. Elsewhere you get captions from patterns, filled in with your words.
Can I use the captions for a business account?
Yes. Pick Professional, and check every fact before you post: the AI only knows what you typed.
Is anything sent anywhere?
No. Your words stay in this tab, and saved captions stay in this browser.