Instagram Help: 'Who can see when I've liked a photo, or when someone's liked my photo?'
When you like a post on lnstagram, you may be wondering who can see your posts? I don't recommend it, but some people want to hide the posts they like on Instagram from a boyfriend or girlfriend? I mean in the age of social media and privacy updates constantly changing it's a valid question. If your Instagram account isn't private and you post information that you wouldn't want the world to see, you may want to make your Instagram account private and be sure that you're aware of The Recent Updates To Instagram's Privacy Settings.
Can someone that doesn't follow you on Instagram see the photos you like?
No, if your account isn't set to private anyone can see what posts that you 'like' as long as they are following you.
When you like a photo, it's visible to anyone who can see the post. Your followers may also see your username below a photo you've liked, no matter how many likes it has (ex: [your username] and 12 others).
After 4 likes, photos show the number of likes, along with usernames of some people you follow who have liked it.
If your account is set to private:
h/t | Instagram