Instagram Post
Preview

A photo that looks fine in your gallery can lose its subject to a crop, and a caption that reads well in a notes app can break in an awkward place in the feed. Previewing catches both before your followers see them.

The tool shows the feed post with your username, caption, likes and the "... more" cut-off, plus a 3-column profile grid with your image in the top-left tile. Switch between light and dark mode to check both.

Instagram's help center says it uploads photos at up to 1080 pixels wide and keeps your photo as is when the aspect ratio is between 1.91:1 (landscape) and 3:4 (tall portrait). Anything outside that range is cropped to fit. Photos wider than 1080 pixels are resized down to 1080 and very small ones are enlarged.

The tool offers 1:1, 4:5, 3:4 and 1.91:1, which are all inside that range. Pick the ratio you plan to choose when you crop in the app and see how your image sits in the frame.

In the feed, a long caption is cut off with a "more" link, so the first lines carry the message. Put the hook, the offer or the question first, and keep line breaks where you want people to pause.

If you need help with the words, try the Instagram caption generator, and use the line break generator so your spacing survives when you paste.

Your grid is where visitors decide whether to follow, and thumbnails are cropped to a tile. This mock-up centers your framed post in the tile so you can see what gets trimmed, and you can switch between tall and square tiles to match what your own profile shows.

As a rule, keep faces, text and products near the middle of the image so a center crop does not cut them off. Always compare with your real profile, because tile shape and spacing can change with app updates.