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Instagram Post Size: Complete 2026 Requirements

Instagram feed posts are best at 1080 × 1350 px (4:5 portrait) or 1080 × 1080 px (square); Stories and Reels are 1080 × 1920 px (9:16). Images are delivered as JPEG.

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  • Exact pixels
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Last updated · US-focused · reviewed by the FreeConverterTools editorial team.

Instagram Post Size requirements
Portrait (best reach)1080 × 1350 px (4:5)
Square1080 × 1080 px (1:1)
Landscape1080 × 566 px (1.91:1)
Story / Reel1080 × 1920 px (9:16)
Profile photo320 × 320 px
FormatJPEG (PNG accepted)

Open the free Resize Image for Instagram

The short answer

Instagram feed posts are best at 1080 × 1350 px (4:5 portrait) or 1080 × 1080 px (square); Stories and Reels are 1080 × 1920 px (9:16). Images are delivered as JPEG. Instagram image sizes: 1080×1350 portrait (4:5), 1080×1080 square, 1080×1920 story/reel. Resize and compress your photos to pixel-perfect free in your browser.

Instagram Post Size — full specification

Every value below is a hard requirement you can hit in your browser. The whole page and its tools run locally, so your image never leaves your device.

How to get a compliant instagram post size for free

1
Pick your format

Choose 1080 × 1350 for feed posts or 1080 × 1920 for Stories.

2
Resize without blur

The resizer keeps edges crisp and runs with no upload.

3
Crop to the ratio

Use the crop tool to centre your subject exactly to 4:5 or 9:16.

4
Download the JPEG

Upload straight to the Instagram app.

Why choose a no-upload instagram post size tool?

Because the fastest, most private way to meet Instagram Post Size specs is to process the image on your own machine. FreeConverterTools.net uses your browser's built-in decoders (Canvas, WebCodecs, WASM) — no upload endpoint, no queue, no account, no watermark and no credit meter. That is exactly what a privacy-first tool should be, and it is why these guides and their tools can stay free.

Frequently asked questions

Is Instagram better at 4:5 or 1:1?
The 4:5 portrait (1080 × 1350) fills more of the phone screen and usually earns more attention than a square post.
Why does Instagram blur my photo?
Uploading a very large or very small image forces Instagram to re-compress it. Export at exactly 1080 px wide to keep it sharp.
What size is an Instagram Story?
1080 × 1920 pixels, a 9:16 vertical frame.

Related free tools

Resize Image for Instagramfree · no uploadCrop to 9:16free · no uploadCrop Image to Squarefree · no uploadCompress JPGfree · no upload

Browse the full image size requirements guide, the directory of all 220 tools, or the image format guide.