PublishPixel

Social media

Instagram Image Size Checker

Check Instagram post, story and Reel dimensions before publishing, including how the 3:4 profile grid will crop them.

Free browser tool

Upload an image to run the check

Upload an image and choose Instagram Post or Instagram Story to review ratio, size, format and export options.

Drop your image here or choose a file

Supports JPG, PNG, WebP, static GIF and basic SVG. Recommended visual limit: up to 15 MB.

Privacy-first: your image is analyzed locally in your browser.

Optional accessibility check. PublishPixel does not invent visual descriptions.

Publishing preset

Scores are estimated from common platform guidelines and practical publishing heuristics.

Choose a preset, upload an image and the results will appear here with score, warnings, practical recommendations and export tools.

Post guidance

1080 x 1440 px (3:4) is the format that survives both places at once: the feed shows it in full and the profile grid, which crops everything to 3:4, has nothing left to cut.

Square 1:1, portrait 4:5 and landscape 1.91:1 still publish normally in the feed. They are simply trimmed in the grid, so keep the subject centred if you use them.

Story guidance

Stories use a 9:16 vertical frame, 1080 x 1920 pixels. Keep important details away from the interface areas at the top and bottom.

Vertical images should leave enough breathing room for captions, controls and profile UI.

Reel guidance

A Reel is also 1080 x 1920 pixels. Its cover is a frame from that same vertical video, and the grid then crops that cover to 3:4.

That is two crops in a row, so a subject sitting near the top or bottom of the Reel can disappear from the profile grid entirely.

Instagram export workflow

Prepare separate exports for feed, story and Reel formats

Instagram images are often reused across different placements, but a feed post, a vertical story and a Reel cover do not share the same visual space. There is also a second crop most people forget: whatever you post, the profile grid renders it at 3:4. A dedicated export helps protect the focal point, reduce awkward crops and keep text readable on mobile screens.

PlacementSizeRatioIn the 3:4 profile grid
Portrait feed post1080 x 1440 px3:4No crop. Fills the feed and the grid.
Portrait feed post (4:5)1080 x 1350 px4:5Top and bottom trimmed. Keep the subject centred.
Square feed post1080 x 1080 px1:1Sides trimmed to make it taller.
Landscape post1080 x 566 px1.91:1Cropped hardest. Wide scenes lose most of their width.
Story1080 x 1920 px9:16Not shown in the grid. Keep details away from UI areas.
Reel and Reel cover1080 x 1920 px9:16The cover is cropped to 3:4. Centre the subject.

Instagram export checklist

  • Export feed posts at 1080 x 1440 px unless you have a reason not to.
  • Create a separate export for feed, story and Reel placements.
  • Check how the post will look in the 3:4 profile grid, not only in the feed.
  • Keep faces, products and key text away from the extreme edges.
  • Review the image on a phone-sized screen before publishing.
  • Compress the final export without blurring text or product details.
  • Verify the final upload in Instagram because the app can still recompress media.

FAQ

Frequently asked questions

What size should an Instagram post be?

1080 x 1440 px (3:4) is the safest default. It fills the feed and matches the 3:4 profile grid, so the post is not cropped in either place. Square 1080 x 1080 px and portrait 1080 x 1350 px still publish fine in the feed, and 1080 x 566 px landscape is the most heavily cropped in the grid.

Why does my 4:5 post get cut off on my profile?

The profile grid crops every thumbnail to 3:4. A 1080 x 1350 px image is taller than that, so the top and bottom are trimmed in the grid even though the feed shows it in full. Either export at 1080 x 1440 px or keep faces, logos and text inside the centre of the frame.

What size is an Instagram Reel and its cover?

A Reel is 1080 x 1920 px (9:16). Its cover comes from that same vertical frame, and the grid then crops that cover to 3:4, so a subject placed near the top or bottom of the Reel can disappear from the profile grid.

Can I check an Instagram Story?

Yes. Choose the Instagram Story preset for the common 1080 x 1920 pixel vertical format.

Does the tool crop my image automatically?

No. It recommends resizing or cropping targets and lets you export a resized version, but creative cropping remains your choice.

Is WebP recommended for Instagram?

JPG and PNG are commonly used. WebP may be useful in some workflows, but always verify your final upload path.