Resize Images to 1080×1080
Resize your images to Instagram’s recommended square post size (1080×1080 pixels). The image will be scaled to fit within these dimensions while preserving aspect ratio.
Image resizer
Drag and drop files or folders here, or
All image formats — up to 50MB each, or 50 from a folder
Ctrl+Z undo · Ctrl+Y redo
Leave one blank to auto-calculate from aspect ratio.
Preserve camera info, GPS, and other metadata
Keyboard Shortcuts
General
When to Use Instagram Post
Instagram feed posts display at 1080×1080 for square images. This is the standard recommended size for maximum quality in the Instagram grid.
Tips for Instagram Post Images
For best results with non-square images, consider using the Crop tool first to frame your subject, then resize. Instagram compresses images internally, so upload at the highest quality.
Frequently Asked Questions
My photo isn’t square — will it be cropped?
No. KoalaPic preserves your aspect ratio. A 4:3 photo will be resized to fit within 1080×1080 — the longest edge will be 1080px, and the image won’t be cropped. Use the Crop tool first if you want a square output.
What format is best for Instagram?
JPG at quality 90+ is the standard. Instagram accepts JPG and PNG. Uploading PNG gives slightly better quality since Instagram re-compresses to JPG internally.