Which Instagram sizes does this tool support?
You can resize for square posts, portrait posts, stories, reels, and profile pictures with preset dimensions.
All Tools
Instagram Post Size Resizer
Resize one image for Instagram post, portrait, story, reel, or profile dimensions in the browser.
Current scope
This tool currently processes one image at a time in your browser. The current file limit is 20MB. This statement covers the current /tools image flow, including poster-prefilled entries, not every feature on poster.sh.
How to resize an image for Instagram
- 1
Upload your image
Select the image you want to post on Instagram.
- 2
Choose the right preset
Pick the preset for post, portrait, story, reel, or profile picture.
- 3
Preview and download
Adjust fit mode if needed, then export the resized JPG file.
Instagram Post Size FAQ
Should I use cover or contain mode?
Use cover when you want the frame filled edge to edge, or contain when you need the full image visible with optional background padding.
Does this route upload the image?
No. The current Instagram resize flow runs in your browser.
What is the current file limit?
The current single-file limit on this public resizer is 20MB.
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