What are the three Instagram post sizes?

Square (1:1, 1080×1080), Portrait (4:5, 1080×1350), and Landscape (1.91:1, 1080×566). This tool lets you switch between all three and exports at the matching resolution for whichever you pick.

Which Instagram post format should I use?

Portrait (4:5) takes up the most vertical space in the feed, which generally means more visibility while someone scrolls — it's the most common choice for single-photo posts. Square is the classic, safest option and displays identically in the feed and the profile grid. Landscape works best for wide shots like scenery, screenshots, or group photos where cropping to square or portrait would cut off the edges.

Why does my portrait post look cropped on my profile page?

Instagram's profile grid always shows a center-cropped square thumbnail of every post, even portrait ones — so the top and bottom margins of a 4:5 post aren't visible there, even though they show fully in the main feed. Turn on Safe Zones in this tool to preview exactly what will and won't survive that crop before you download.

Can I switch formats after I've already positioned my photo?

Yes — switch between Square, Portrait, and Landscape at any time and the frame updates immediately. Your zoom and rotation carry over, so you'll usually only need to re-pan slightly to re-center the new frame shape.

My photo doesn't fill the whole frame — what should I do?

Turn on a background fill. Blur uses a softened, zoomed-in copy of your own photo to fill the gaps (similar to what Instagram's own app does); solid color and gradient give you a clean, deliberate look instead.

Why does my resized post look blurry after I upload it?

Usually because the source photo's resolution was smaller than the export target for your chosen format, or you zoomed in past the photo's native resolution. The live 'Instagram Ready' badge in this tool warns you before you download if either is happening.

What file formats can I upload and download?

Upload PNG, JPG, or WebP. Download as JPEG (Instagram Optimized or Smaller File Size presets) or PNG (Maximum Quality preset).

Is there a size limit on the photo I upload?

No hard limit is enforced by this tool, but very large source photos (many megapixels) may take a moment longer to load into the editor. Processing happens entirely in your browser — nothing is uploaded to a server.

Instagram Post Resizer — Square, Portrait & Landscape Free

Fit a photo to Instagram's exact feed-post dimensions in seconds. Switch between Square (1:1), Portrait (4:5), or Landscape (1.91:1), drag to reposition and zoom to fill the frame, then preview how the profile grid will crop your post before you export at Instagram's recommended resolution.

Quick Answer

An Instagram Post Resizer fits your photo to one of Instagram's three feed formats — Square (1080×1080), Portrait (1080×1350), or Landscape (1080×566) — with pan and zoom to frame it exactly. It also previews how Instagram's profile grid will center-crop the post to a square thumbnail, so nothing important gets trimmed. Free, and nothing is uploaded to a server.

Upload a photo to start editing

PNG, JPG, or WebP supported

Choose File

How to Use the Instagram Post Resizer

1
Upload the photo you want to resize for an Instagram post.
2
Pick a format: Square (1:1), Portrait (4:5), or Landscape (1.91:1).
3
Drag to reposition and use the zoom slider to fill the frame exactly how you want it.
4
Turn on Safe Zones to preview how Instagram's profile grid will center-crop your post to a square thumbnail, so nothing important gets trimmed.
5
Pick a background fill (blur, solid color, or gradient) if your photo doesn't naturally fill the frame, then choose an export quality.
6
Download your resized post at Instagram's recommended resolution and upload it directly.

Why Use Instagram Post Resizer?

Instagram's feed accepts three different post shapes — square (1:1), portrait (4:5), and landscape (1.91:1) — and picking the wrong one, or resizing carelessly, means Instagram either crops content you wanted to keep or letterboxes your photo with empty bars. This tool lets you switch between all three official formats and fill each one precisely with pan and zoom, instead of guessing at dimensions in a generic image editor. It also solves a gotcha most people don't know about: even though a 4:5 portrait post displays at full height in the main feed, Instagram's profile grid always shows a center-cropped square thumbnail of it — so content near the top or bottom of a portrait post can be invisible on your own profile page. Toggling Safe Zones on previews exactly that crop before you download, so you can reframe before it's a problem. Rotate or flip to fix orientation, and use a background fill when your photo doesn't naturally cover the chosen frame. Every format exports at Instagram's recommended 1080px-wide resolution so your post looks sharp instead of blurry or upscaled.

Frequently Asked Questions

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