Resize images for Instagram
Photos come out at 1080 × 1350, Instagram’s portrait post size, cropped to 4:5 so nothing is squeezed. Move the crop to keep what matters, or pick Square or Story instead.
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JPG, PNG, WebP, AVIF, HEIC and GIF, up to 100 MB each
How it works
Resize in three steps
- 1
Drop in one photo or a whole set.
- 2
Keep 1080 × 1350, or pick Square or Story. Tap Crop to choose the part each photo keeps.
- 3
Download the photos one by one or as a ZIP: 3 a day on Free, unlimited on Pro.
The sizes Instagram shows
Portrait posts at 1080 × 1350 (4:5) take up the most room in the feed. Square posts are 1080 × 1080, and stories and reels 1080 × 1920 (9:16). The profile grid previews posts at 3:4, so keep faces and text away from the top and bottom edges.
Cropped to fit, never squeezed
A photo of another shape is cropped to the size’s shape, from the middle by default. Tap Crop to move the frame, or choose Add bars under How to fit to keep the whole photo with white or black bars.
Why 1080 pixels wide
Instagram shows posts 1080 pixels wide and resizes anything larger on upload. Starting at 1080 with high quality means one gentle recompression on Instagram’s side instead of a heavy one.
Frequently asked questions
What is the best size for Instagram posts?
1080 × 1350 for portrait posts, which fill the most of the feed, or 1080 × 1080 for squares. Stories and reels are 1080 × 1920. Instagram changes its layouts from time to time, so check its help pages if something looks off.
Can I keep the whole photo without cropping?
Yes. Under How to fit, choose Add bars, and pick white, black or another colour. The whole photo sits inside 1080 × 1350 with bars where the shapes differ.
Can I do a whole carousel at once?
Yes. Drop in every photo and each comes out at the same size, so the carousel lines up. Open any photo in the list to move its crop.
Are my images uploaded?
No. Graviton converts and compresses inside your browser, so your images never leave your device. Nothing is sent while you compress. When you download, the browser sends only a one-way fingerprint of the image, so the download can be counted and approved. Graviton stores none of it.
Is it free?
Yes. Compressing and converting are free and unlimited, with no account needed. Downloading needs a free account, which includes 3 downloads a day with every format and setting. Pro removes the daily limit.