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.
OG / Link Preview 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
Open Graph Image is 1200 x 630 pixels - a landscape 40:21 frame. Drop any image in and it is resized to exactly that, with a live preview so you can see the crop before you commit to it. This is the shape Facebook, LinkedIn, X and Slack all use for link previews, so one image serves every platform. One export covers Facebook, LinkedIn, X, Slack and WhatsApp link previews - they all read the same Open Graph tag. Nothing is uploaded. The resize happens on your own device, so the file never reaches a server and it keeps working offline once the page has loaded. Cropping to 40:21 from another shape removes part of the image by definition. The preview makes that visible before you download rather than after.
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 1200 x 630 pixelsThe Open Graph Image 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.
- Export as JPG, PNG or WebP, whichever the platform prefers.
- No limit on how many images you resize.
- Resizes to exactly 1200 x 630 pixels, the current Open Graph Image size.
- Runs in your browser - no upload, no account, no watermark.
Common uses
- Getting a correctly sized image without opening a full editor for a 30-second job.
- Fixing an image a platform rejected for being the wrong dimensions.
- Preparing a batch at 1200 x 630 pixels before a scheduled post.
- Resizing on a phone without installing an editing app.
- Setting the link preview for a web page.
Tips for better results
- PNG keeps text and sharp edges crisp at this size; JPG is smaller for photographs.
- Check the result on the platform itself - feed thumbnails are often cropped again from the size you upload.
- One export covers Facebook, LinkedIn, X, Slack and WhatsApp link previews - they all read the same Open Graph tag.
- Crop to 40:21 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.
- Re-saving the same JPG over and over. Each save loses a little more detail, permanently.
- Putting important detail near the edges of a 40:21 frame. Platforms crop again for thumbnails and previews.
- Assuming another platform at the same pixel size behaves identically. One export covers Facebook, LinkedIn, X, Slack and WhatsApp link previews - they all read the same Open Graph tag.
Frequently asked questions
1200 x 630 pixels - a landscape 40:21 frame, 0.8 megapixels.
Drop it onto this page. The Open Graph Image preset is already selected, so it resizes straight to 1200 x 630 pixels and shows the crop before you download.
No. The resize uses your own device image engine, so files never leave your computer.
JPG for photographs, PNG when there is text or transparency, WebP when the platform accepts it and you want the smallest file.
Yes - free, no signup, no watermark and no limit on how many images you resize. It runs in your browser, so it costs nothing to provide.
One export covers Facebook, LinkedIn, X, Slack and WhatsApp link previews - they all read the same Open Graph tag.
Yes. It runs in the browser, so it works on iPhone and Android as well as desktop, with no app to install.
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