Resize Image for Instagram Online — Free
Runs 100% in your browser — your files never leave your device.
Instagram crops unpredictably when the aspect ratio is off — heads get cut, compositions break. Pick the format you need (4:5 post, 1:1 square, 9:16 story), and your image is center-cropped to the exact shape, then scaled to Instagram's pixel size. No squashing, no surprises, and the file never leaves your device.
How it works
- 1
Drop your image
JPG, PNG, or WebP — its current size is shown right away.
- 2
Pick the format
Post (4:5), square (1:1), or story/reel (9:16) at Instagram's exact pixel sizes.
- 3
Download
The image is center-cropped and scaled locally, then saved with one click.
About this tool
Instagram's actual image sizes
Feed posts render at 1080 pixels wide — square (1080×1080), portrait (1080×1350), and landscape (1080×566) all display at that width. Stories and Reels want 1080×1920. Uploading at these dimensions avoids the platform's own downscaling, which is harsher than a controlled resize.
Crop or resize — know which you need
Resizing scales without cutting; the platform then crops to fit its shapes. For full control of the composition, crop to the exact target ratio first with the crop tool, then resize to the pixel dimensions here.
Quality notes
Instagram recompresses every upload, so start from the highest-quality source you have — resizing a compressed screenshot compounds the loss. Export the resized result as PNG for graphics or high-quality JPG for photos.
Frequently asked questions
What is the best size for Instagram posts?
1080×1350 for portrait posts — the tallest shape the feed allows, which occupies the most screen. 1080×1080 for square; 1080×566 for landscape.
Why does my upload look blurry on Instagram?
Usually an upload below the target size (Instagram upscales badly) or a heavily compressed source. Resize to the exact dimensions here and upload the highest-quality file you have.
Should I resize Stories to 1080×1920?
Yes — Stories fill the full screen vertically, and anything else gets cropped or bordered. The tool presets the exact dimensions.