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Instagram post size: 1080×1080

A square Instagram post displays at 1080×1080 pixels, and Instagram compresses whatever you upload fairly hard, so a soft source photo comes out worse than it went in. This Instagram post size resizer crops or pads your photo to exactly 1080×1080 first, so start from the sharpest image you have.

  • No upload — files stay on your device
  • Works offline once loaded
  • Free forever, no signup, no watermark

Target for this placement: {{ width }}×{{ height }} px ({{ label }})

Drop a photo here, or tap to choose JPG, PNG or WebP — nothing is uploaded
Fit mode
Output format
Padding
Quality
Rendering {{ width }}×{{ height }}…
Live preview
  • Original {{ sourceSizeLabel }}
  • Output size {{ resultSizeLabel }}
  • Output pixels {{ width }}×{{ height }}

Under the {{ maxKbLabel }} limit for this placement.

Quality was lowered automatically to fit the size limit.

{{ hint }}

How to use this tool

  1. Drop your photo

    Add any JPG, PNG or WebP photo — drag it onto the box or tap it to choose one from your device.

  2. Pick a fit mode

    Choose Cover to crop and fill the frame, or Contain to keep the whole photo and pad the edges with a colour or a blurred copy of the image.

  3. Download the exact size

    Check the live preview and file size, then download — the image is already the exact pixel size this placement needs.

Questions people ask

What size should a square Instagram post be?

Instagram displays square posts at 1080×1080 pixels. Uploading exactly that size stops Instagram re-cropping or resampling the edges on its own.

Why do my Instagram photos look blurry after posting?

Instagram re-compresses every upload, and it compresses harder when the source image is already low resolution or heavily edited. Starting from a sharp, correctly sized 1080×1080 file, like the one this tool produces, gives Instagram's compression less damage to do.

Does Instagram still support the 4:5 portrait post?

Yes — a 1080×1350 portrait post takes up more feed space than a square one, but 1080×1080 remains fully supported and is the safer choice if you also want the image to work as a clean grid tile.

Is my photo uploaded anywhere?

No. Resizing happens entirely inside your browser using the Canvas API — this site has no upload endpoint, and the tool keeps working if you disconnect from the internet after the page loads.

What is the difference between Cover and Contain?

Cover scales your photo up until it completely fills the target frame and crops away whatever does not fit, so the result is nothing but photo, no padding. Contain scales the photo down until the whole thing is visible, then pads the leftover space with a colour or a blurred, zoomed-in copy of the same photo so it still looks intentional.

Do social media image sizes change over time?

Yes — platforms adjust these specs every year or two without much notice. The dimensions on this page were last verified in August 2026; if a placement changes after that, the pixel size and any file-size limit shown above may be out of date, so it is worth a quick check against the platform's current help page before a high-stakes upload.

Related tools

Free because it costs us nothing to run: your browser does the work, not our servers. Made by Dynamb Technologies — we build software for businesses.