Hooks that survive the “…more” cut, captions in the length Instagram rewards, and hashtags written as keyword phrases.
Example · as followers see it
Reels player
Your photo appears hereNowhere to be this morning
yourusername
First sip, and no rush today Some mornings remind you to slow down. The foam art was a masterpiece, the playlist was perfect, and for once I wasn't rushing anywhere.
Home feed
yourusername
Original audio

2,847 likes
Your username starts this line in the home feed. Add it to see where the feed cuts your caption.
Add it to check the home feed, where your username shares the Reel's one line. Until then only the Reels player is checked.
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Either under 150 characters or over 500. The middle range gets fewer saves and shares, so the generator writes short or long, never medium.
Three to five, written as the phrase someone would search. Instagram treats hashtags as topic labels rather than reach drivers.
Yes, and they are cut differently. A Reel shows one line: over the video in the Reels player, ending in “…”, and in the home feed, where your username comes first on the line and it ends in “… more”. The check always measures the player, and the home feed once you add your username, since it starts that line; the hook has to survive each. Photo posts and carousels show up to two lines before “… more”, and are checked against that.
Yes. The phone preview shows your caption exactly where Instagram cuts it, with the hidden part greyed out below the fold line. A Reel is shown twice, in the Reels player and in the home feed, since it is cut in both.