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Resize Image for Instagram

Start from the aspect Instagram will publish so their extra compression is less of a surprise.

What this does

Instagram still prefers certain aspect ratios (square, 4:5 portrait, 1.91:1 landscape). This page helps you resize a already-cropped image to a sensible pixel width (often 1080px on the short or long edge, depending on layout) and export a reasonably sized JPEG.

WhatsApp and email care about KB caps. Instagram cares about aspect and a 1080px pipeline. Using a 20KB government preset here will make the post look like 2009.

People who crop in another app and want a clean 1080-wide JPEG without a desktop editor.

Instagram will encode your file again. Starting from a 50MB original does not preserve more detail in the feed; it just gives their encoder a harder job. 1080px on the relevant edge is the practical master.

Aspect is the real creative choice. A 4:5 crop changes the story. Resize cannot invent that crop. Do the crop with intent, then use this page as the last export.

When to use it

  • Stories or feed posts look softer than Lightroom.
  • You export huge TIFFs and the phone struggles to upload.
  • You want a consistent 1080px catalog.

How to

  1. Crop to the aspect you want. Do this in IG, Lightroom, or any cropper.
  2. Resize to ~1080 on the width. Use exact or max-width mode.
  3. Keep quality high. JPEG 80%+.
  4. Post the file. Upload from the camera roll.

Features

  • Exact dimensions. Type 1080×1350 when you already cropped 4:5.
  • Fast JPEG. Smaller uploads, similar look.
  • On-device. Brand shoots stay local until you post.

Why it helps

  • Predictable posts. You choose 4:5 vs 1:1 before Instagram does.
  • Lighter uploads. Phones thank you.

Use cases

  • Product grids. Same width every time so the grid does not jump.
  • Portrait posts. 4:5 uses more feed real estate than landscape.

Examples

  • Phone photo to 4:5. Crop 4:5 elsewhere, then exact 1080×1350 JPEG 85% here.

Common mistakes

  • Uploading 6000px JPEGs. Instagram downsamples anyway and may add artifacts.
  • Letterboxing with huge black bars instead of cropping to 4:5.

Tips

  • Feed portrait is often 1080×1350. Square is 1080×1080. Confirm current IG guidelines if you need pixel-perfect ads.
  • Export JPEG around 80–90% after resize. You are not chasing 50KB.

FAQ

Does this post to Instagram?
No. It only prepares an image file.
Stories vs feed?
Stories are 9:16. This resizer will do any pixels you enter — set 1080×1920 if that is what you need.