Social Media Image Resizer
Resize one image to every platform's exact dimensions and download them in seconds. Runs entirely in your browser, so your image is never uploaded.
Drop an image, or click to choose
JPG, PNG, or WebP, up to 25MB
Free and instant. Your image never leaves your browser.
Add an image and pick your sizes. Previews appear here, ready to download.
Three steps, under 5 minutes.
Drop your image
It's read locally by your browser. Nothing is sent to a server.
Pick your sizes
Every current dimension for Instagram, LinkedIn, X, YouTube, and more.
Download
Grab one size, or all of them at once, cropped properly rather than stretched.
Why nothing is uploaded
Almost every online image resizer works by uploading your file to a server, processing it there, and sending it back. That is fine for a holiday photo and genuinely risky for an unreleased product shot, a client asset, or anything under embargo.
This one uses the canvas built into your browser, so the image is read from disk, resized in memory, and saved back to disk without ever crossing the network. You can watch it work with your connection off.
Cropping beats stretching, always
A 16:9 image and a 4:5 slot do not fit together, and something has to give. The lazy answer is to stretch, which distorts every face and logo in the frame and is instantly visible to anyone looking. This tool never does that.
Instead the image is scaled up until it fills the target box and the overflow is cropped from the centre. That preserves proportions perfectly, at the cost of losing some edges, which is the trade professional designers make too. If something important sits near an edge, check the preview before publishing.
Design once for the tightest crop
If you know a graphic will be reused across platforms, the practical move is to build it for the narrowest aspect ratio you need, usually a 4:5 portrait or a 1:1 square, and keep the important content in the middle. Then every other crop takes care of itself.
The common failure is designing a wide banner and discovering the headline gets cut in half on a phone. Centre the text, leave breathing room at the edges, and one asset can serve every placement without a redesign.
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Good to know.
What size should a social media image be?
It depends on the placement: 1080x1080 for a square Instagram post, 1080x1350 for portrait, 1080x1920 for Stories and Reels, 1200x627 for a LinkedIn post, 1600x900 for X, and 1280x720 for a YouTube thumbnail. All of those are presets above.
Does my image get uploaded anywhere?
No. The resizing happens in your browser using canvas, so the file never leaves your device. You can disconnect from the internet and the tool still works, which is the point for anyone handling unreleased assets.
Does it stretch or crop the image?
It crops. The image is scaled until it fills the target size and the overflow is trimmed from the centre, so proportions are never distorted. Stretching is not offered because it visibly ruins faces and logos.
What format do I get back?
JPEG at 92% quality, which is the right trade-off for social platforms since they re-compress everything you upload anyway. Transparent PNGs are flattened onto white so you don't get a black box.
How is this different from CaptureFlow?
This resizes an image you already made. CaptureFlow makes the content: one idea becomes posts, carousels, quote images, and clips sized for every platform, then gets scheduled for you.
Right size, every platform, every time.
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