Image Resizer
Resize images to any dimension
100% free. Runs entirely in your browser - your files and data never leave your device and nothing is uploaded to any server.
Portrait Post selected — upload an image to apply it.
Drag & drop files here
or browse to upload
Supports PNG, JPG, WebP up to 20MB
Processed in your browser - your file never leaves this device.
About this tool
The Instagram Portrait size is 1080 x 1350 pixels, a portrait 4:5 frame. Drop an image on this page and the preset is already applied - there is nothing to type in. 4:5 is the tallest ratio Instagram allows in the feed, so it takes up the most screen space without being cropped. Taller than a square without triggering a crop, which makes it the largest footprint a feed post can occupy. No upload and no account. Your browser does the work, so a large batch is as fast as your machine rather than as fast as a server. Feeding in a different aspect ratio means something gets cut. The preview shows exactly what, so you can reposition instead of discovering it after posting.
How to use this tool
- Drop your image inAny JPG, PNG or WebP. Nothing is uploaded - your browser reads the file directly.
- It resizes to 1080 x 1350 pixelsThe Instagram Portrait preset is already selected on this page, so there is nothing to type in.
- Check the preview and downloadThe preview shows the exact crop. Reposition if you need to, then save as JPG, PNG or WebP.
Key features
- Live preview, so you see the crop before downloading instead of after.
- No limit on how many images you resize.
- Export as JPG, PNG or WebP, whichever the platform prefers.
- Resizes to exactly 1080 x 1350 pixels, the current Instagram Portrait size.
- Runs in your browser - no upload, no account, no watermark.
Common uses
- Posting a taller image that fills more of the feed.
- Getting a correctly sized image without opening a full editor for a 30-second job.
- Preparing a batch at 1080 x 1350 pixels before a scheduled post.
- Resizing on a phone without installing an editing app.
- Fixing an image a platform rejected for being the wrong dimensions.
Tips for better results
- Start from the largest original you have. Scaling up to 1080 x 1350 pixels from something smaller looks soft, and nothing undoes that.
- Taller than a square without triggering a crop, which makes it the largest footprint a feed post can occupy.
- PNG keeps text and sharp edges crisp at this size; JPG is smaller for photographs.
- Crop to 4:5 before resizing when the subject matters - then you choose what is lost rather than the tool.
Mistakes to avoid
- Scaling a small image up to hit the pixel count. The file gets bigger; the detail does not come back.
- Putting important detail near the edges of a 4:5 frame. Platforms crop again for thumbnails and previews.
- Re-saving the same JPG over and over. Each save loses a little more detail, permanently.
- Letting the image stretch instead of keeping the ratio. A squashed face is more obvious than a tight crop.
Frequently asked questions
1080 x 1350 pixels - a portrait 4:5 frame, 1.5 megapixels.
Drop it onto this page. The Instagram Portrait preset is already selected, so it resizes straight to 1080 x 1350 pixels and shows the crop before you download.
No. The resize uses your own device image engine, so files never leave your computer.
Yes. It runs in the browser, so it works on iPhone and Android as well as desktop, with no app to install.
Taller than a square without triggering a crop, which makes it the largest footprint a feed post can occupy.
No. It keeps the 4:5 ratio and shows what will be cropped, so you can reposition before downloading rather than finding a bad crop afterwards.
JPG for photographs, PNG when there is text or transparency, WebP when the platform accepts it and you want the smallest file.
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