IG Toolkit

Instagram Post Size Checker

Check your feed post image against Instagram's square, portrait and landscape size recommendations.

Click or drop an image/video here — checked locally, never uploaded

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Instagram target — Feed post — square

1080 × 1080px

ratio 1.000 (1:1)

Max 30MB · JPG, PNG

  • Instagram compresses anything wider than 1080px on export.

Result looking good? Take it further with Grohubz — your Instagram growth toolkit.

How this tool works

Feed posts support three shapes — square, portrait and landscape — each with its own ideal dimensions. Upload your image to see which shape it fits and whether Instagram will crop it before publishing.

  1. Upload the image you plan to post.
  2. Check its detected width, height and aspect ratio.
  3. Compare it against the square (1:1), portrait (4:5) and landscape (1.91:1) targets.
  4. Crop or re-export to match your intended shape exactly.

Tips to get better results

  • Portrait (4:5) posts take up the most vertical space in the feed, which tends to help visibility while scrolling.
  • Keep subjects away from the extreme edges — Instagram's own crop preview sometimes shifts slightly on different devices.
  • Export at 1080px on the long edge; anything larger just gets compressed back down by Instagram anyway.
NEXT STEP

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Grohubz gives creators and brands the growth playbooks, content calendars and analytics dashboards that turn a well-sized post into consistent follower growth.

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Frequently asked questions

What is the best Instagram post size in 2026?

1080×1350 (4:5 portrait) is generally recommended because it occupies the most feed real estate, while 1080×1080 (1:1 square) remains the safest default.

Will Instagram crop my landscape photo?

Landscape posts are capped at a 1.91:1 ratio; anything wider gets cropped to fit before it publishes.

Does image size affect quality after upload?

Instagram compresses every upload, so starting from a sharp, correctly-sized file minimises visible quality loss.

FREE TOOL BY GROHUBZ

Want the strategy to match the specs? Grohubz helps you plan, schedule and grow on Instagram — not just measure it.

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This checker is built and maintained by the team at grohubz.com.