Instagram Post Size
Resize an image to Instagram's exact post dimensions - free, instant.
Your image is resized inside this page. It is never uploaded.
What this tool does
Choose square, portrait or landscape, upload an image, and get back a correctly cropped and resized file at Instagram's exact recommended pixel dimensions for that shape - ready to post without Instagram doing its own crop first.
Center-crops and resizes to Instagram's three standard feed-post shapes: square (1080×1080), portrait (1080×1350) and landscape (1080×566).
Uses Instagram's own recommended pixel dimensions for each shape, not just the aspect ratio, so the result is already at full posting resolution.
Corrects EXIF orientation from the source photo before cropping, so a sideways phone photo crops in the direction you actually see it, not the camera sensor's raw orientation.
Re-crops instantly when you switch between square, portrait, and landscape, using the same already-loaded image rather than asking you to choose the file again.
How to use it
- Choose a post shape.
- Upload your image.
- Download the resized result.
Why use this resizer
Instagram crops anything outside its shapes, and the crop may cut off your subject. Resizing to the standard sizes first shows what will be kept.
Why we built it
We built the Instagram post size tool to use Instagram's recommended pixel dimensions for each shape, not just the matching ratio. Split a picture into a grid with the Instagram grid maker and plan carousels with the Instagram carousel maker.
Related tools worth a look: the YouTube Thumbnail Downloader.
Who this tool is for
- Instagram creators and social media managers
- Small-business owners posting products
- Photographers sharing work
When to use it
- Preparing a feed post.
- Choosing between square, portrait and landscape.
- Avoiding unexpected cropping.
- Resizing for upload.
Why the exact pixel size matters, not just the ratio
Two images can share a ratio and still look different once Instagram compresses them.
A 1:1 ratio can be satisfied by a tiny 200×200 image or a full-resolution 1080×1080 one, but Instagram's own re-compression treats them differently - a low-resolution upload gets visibly softer once Instagram's servers process it. Using Instagram's actual recommended pixel dimensions for each shape, not just the matching ratio, means the file arrives at the resolution Instagram expects, so its own compression pass has real detail to work with rather than stretching a small image up.
Why phone photos aren't cropped sideways here
A photo's raw pixel data can be stored sideways with a tag telling viewers how to rotate it, and cropping tools that ignore that tag crop the wrong side of the photo.
Before cropping to any of the three post shapes, this tool reads the source photo's EXIF orientation tag and corrects the pixel grid to match what you actually see - the same correction applied by this site's dedicated image cropper. Switching between square, portrait, and landscape afterward doesn't re-read the file at all: the already-oriented image stays loaded in memory, so changing shape just re-runs the crop math against it and shows a new result immediately.
What you give it, and what you get back
| Item | Details |
|---|---|
| Input | An image. |
| Options | Square, portrait or landscape. |
| Output | A resized image at Instagram's recommended dimensions. |
Issues you may run into
| What you see | Why it happens | What to do |
|---|---|---|
| Subject is cut off | The image is centre-cropped. | Leave margin or choose another shape. |
| Quality looks lower | Instagram recompresses. | Upload at the recommended size. |
| Stories need a different size | This is for feed posts. | Use a story size guide. |
Assumptions and limitations
- Center-cropping to a target shape will cut off the edges of a source image that isn't already close to that shape - a very tall original loses more from the sides when squared off, for instance.
- This produces a correctly sized image file - actually posting it still happens in the Instagram app or website.
Frequently asked questions
What size should an Instagram post be?
Square posts are 1080×1080, portrait posts are 1080×1350, and landscape posts are 1080×566 - this tool outputs the exact dimensions for whichever shape you pick.
Why does my image get cropped instead of just resized?
An image that isn't already the target shape would be stretched out of proportion by a plain resize - centre-cropping to the correct shape first keeps everything looking natural, at the cost of trimming some edges.
Which shape should I use?
Portrait (4:5) takes up the most vertical space in the feed and tends to get more attention, and since Instagram moved its profile grid to 3:4 previews in late 2025 it loses only a thin strip top and bottom there; square is the classic safe choice but is cropped at the sides in the grid; landscape suits wide scenes but takes up the least feed space.
Does this post the image to Instagram for me?
No - it produces a correctly sized image file, which you then post yourself through Instagram.
Is my image uploaded anywhere?
No. Resizing happens entirely in your browser - nothing is sent to a server.
Will a sideways phone photo crop in the wrong direction?
No - EXIF orientation is corrected before cropping, so the crop matches what you see on screen, not the camera sensor's raw orientation.
Can I switch between square, portrait, and landscape without re-uploading?
Yes - switching shape instantly re-crops the same already-loaded image, with no need to choose the file again.