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.
X 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 X Post Image size is 1600 x 900 pixels, a landscape 16:9 frame. Drop an image on this page and the preset is already applied - there is nothing to type in. 16:9 is what X shows uncropped in the timeline; taller images get cut until tapped. 16:9 is the widest shape X shows without cropping in the timeline; anything taller is cut until someone taps it. 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. If your source is a different shape, the tool shows what will be cropped rather than silently squashing it. A 16:9 target always loses something from another ratio - seeing where is the difference between a usable result and a cut-off head.
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 1600 x 900 pixelsThe X Post 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
- No limit on how many images you resize.
- Live preview, so you see the crop before downloading instead of after.
- Export as JPG, PNG or WebP, whichever the platform prefers.
- Runs in your browser - no upload, no account, no watermark.
- Resizes to exactly 1600 x 900 pixels, the current X Post Image size.
Common uses
- Fixing an image a platform rejected for being the wrong dimensions.
- Getting a correctly sized image without opening a full editor for a 30-second job.
- Resizing on a phone without installing an editing app.
- Preparing a batch at 1600 x 900 pixels before a scheduled post.
- Attaching an image to a post.
Tips for better results
- 16:9 is the widest shape X shows without cropping in the timeline; anything taller is cut until someone taps it.
- Check the result on the platform itself - feed thumbnails are often cropped again from the size you upload.
- Crop to 16:9 before resizing when the subject matters - then you choose what is lost rather than the tool.
- Start from the largest original you have. Scaling up to 1600 x 900 pixels from something smaller looks soft, and nothing undoes that.
Mistakes to avoid
- Assuming another platform at the same pixel size behaves identically. 16:9 is the widest shape X shows without cropping in the timeline; anything taller is cut until someone taps it.
- 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.
- Scaling a small image up to hit the pixel count. The file gets bigger; the detail does not come back.
Frequently asked questions
1600 x 900 pixels - a landscape 16:9 frame, 1.4 megapixels.
Drop it onto this page. The X Post Image preset is already selected, so it resizes straight to 1600 x 900 pixels and shows the crop before you download.
No. It keeps the 16:9 ratio and shows what will be cropped, so you can reposition before downloading rather than finding a bad crop afterwards.
16:9 is the widest shape X shows without cropping in the timeline; anything taller is cut until someone taps it.
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.
Yes. It runs in the browser, so it works on iPhone and Android as well as desktop, with no app to install.
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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