Instagram Post Resizer
Fit a photo to a square or 4:5 portrait Instagram post, drag and zoom to frame it just right, then download the result — every step runs locally in your browser.
1. Image & size
Canvas · localDrop an image here
or click to browse · or paste with Ctrl/Cmd + V
Background
Adjust
Frame
Tip: drag the preview to reposition the image inside the frame.
2. Preview & export
—About Instagram Post Resizer
The Instagram Post Resizer crops and frames any image to a square or portrait post shape, with guides, a background fill, and filters. It is for creators and small businesses preparing photos for the feed without an awkward auto-crop.
Uploading an odd-shaped image lets the app crop it unpredictably. Framing it yourself first means the important part of the photo survives, and the editing happens in your browser rather than on a server.
Step by step
- Drop the image you want to post.
- Choose a square or portrait post shape.
- Zoom and drag to frame the subject within the guides.
- Set a background fill for any empty area and apply a filter if you want.
- Download the post-ready image.
What it offers
- Square and portrait post shapes
- Zoom-and-drag framing with post guides
- Background fill for letterboxed images
- Optional filters, applied in the browser
Tips for best results
- Portrait (4:5) takes up more vertical space in the feed than a square, so it draws more attention.
- Keep faces and key subjects away from the very edges in case of minor cropping.
- This tool is not affiliated with Instagram; it just matches the common post proportions.
Why people use it
Controlled crop
Decide what stays in frame instead of leaving it to auto-crop.
Feed-ready shape
Match the square or portrait proportions the feed expects.
Private
Your photo is framed on your device, never uploaded.
No app needed
Prepare posts from a browser on any device.
Common questions
This runs entirely in your browser
No file or text you enter here is uploaded. Encoding and decoding happen on your device using native browser APIs — close the tab and nothing remains on a server.