Instagram Photo Resizer
Instagram re-compresses every upload — and the more it has to resize your photo itself, the worse the result looks. Uploading at the exact target size (1080px wide, in the right aspect ratio) is the trick photographers use to keep feeds sharp. Pick your format below: square post, 4:5 portrait (the biggest feed footprint), or full-screen story.
100% private — this tool runs in your browser. Your image is never uploaded to any server.
Instagram Photo Resizer — specification
| Square | 1080 × 1080 px (1:1) |
|---|---|
| Portrait | 1080 × 1350 px (4:5) — most screen space |
| Landscape | 1080 × 566 px (1.91:1) |
| Story/Reel | 1080 × 1920 px (9:16) |
| Tip | Upload at exact size to minimize Instagram's re-compression |
How to use this tool
- Select the preset that matches your form, then tap the drop area and choose your image (or drag it in).
- The tool processes the file instantly on your device — quality is tuned automatically to meet the target.
- Check the spec strip: a green ✓ stamp means the file meets the requirement.
- Tap Download and upload the file to your form.
Frequently asked questions
Why does Instagram make my photos look worse?
Instagram re-compresses aggressively and resizes anything that isn't at its display resolution. Uploading at exactly 1080px in the correct ratio removes the resize step, leaving only the compression — the biggest quality improvement you can make for free.
Which post size gets the most engagement?
Portrait 4:5 (1080×1350) occupies the most vertical feed space, which correlates with more time on screen. Square remains the safe default for grids; landscape shows smallest.
How do I fit a landscape photo into a portrait post?
This tool center-crops to the target ratio, so wide photos lose their edges in portrait mode. If the composition doesn't survive the crop, choose the landscape preset instead, or recompose in an editor before sizing here.