How to use the Resize Image for Instagram
- Drop your photo — the 1080 × 1350 Instagram size is already selected.
- Choose Crop to fill (no borders) or Fit inside (keeps the whole photo).
- Download the JPG and post it.
Instagram post sizes
- Portrait 4:5 — 1080 × 1350 px: the tallest post the feed shows, so it gets the most attention.
- Square 1:1 — 1080 × 1080 px: the classic format.
- Landscape 1.91:1 — 1080 × 566 px: wide shots; small on phones.
- Story and Reel — 1080 × 1920 px: use Instagram Story size.
Instagram scales anything wider than 1080 px down, so uploading exactly 1080 px wide keeps the result sharp and predictable.
Crop or fit?
Crop to fill trims the edges so the photo fills the frame. Fit inside keeps the whole picture and fills the gap with a color — or use Instagram No Crop to add even white borders.
Also searched as: instagram post size, instagram image size, 1080x1350, instagram portrait size, resize photo for instagram.
Tools that pair well with the Resize Image for Instagram
- Image Resizer — Resize a photo to exact pixel dimensions or a percentage, crop it to fill a social-media size, or fit it inside a frame with a background color — all locally in your browser.
- Crop Image to Square — Crop a photo to a perfect square (1:1) — for profile pictures, Instagram posts, product photos and app icons.
- Image Compressor — Reduce photos and graphics by up to 90% with no visible quality loss, depending on the image and settings.
- Barcode Generator — Make scannable barcodes for products, inventory, shipping and libraries — check digits are calculated for you, and you can download a sharp SVG for print or a PNG for documents.
Frequently asked questions
What size should an Instagram post be?
1080 × 1350 px (4:5) for portrait posts, which take the most space in the feed, or 1080 × 1080 px for square posts.
Will Instagram crop my photo?
Only if it’s taller than 4:5 or wider than 1.91:1. Resize to one of those ratios first and nothing gets cut.
Does resizing lower the quality?
Shrinking keeps the photo sharp. Enlarging a small photo can look soft, so start from the largest version you have.
Is my photo uploaded?
No. Resizing happens in your browser.
Can I install Resize Image for Instagram as a web app and use it offline?
Yes. Resize Image for Instagram is an installable web app (PWA) — installed from your browser, not downloaded from an app store. Click Install app at the top of this page in Chrome or Edge (Windows, macOS, Linux, ChromeOS) or on Android, use Share → Add to Home Screen on iPhone and iPad, or File → Add to Dock in Safari 17+ on a Mac. It then opens in its own window with its own icon, and because it runs entirely in your browser it keeps working offline. Firefox on desktop can’t install web apps. How installing works.