Image Resizer
Resize images to exact pixel dimensions or by percentage — client-side, instant.
Why resize an image?
Resizing is one of the most common image tasks. Websites often require product photos at a specific pixel dimension. Email servers reject attachments over a certain size. Social media platforms crop or distort images that are the wrong aspect ratio. Profile photos need exact dimensions like 400×400 or 200×200. Having a quick, no-friction resizer accessible from any browser solves all of these cases immediately.
How the resizer works
When you load an image, its original dimensions are shown. You then enter a target width or height. With "Keep aspect ratio" on, the other dimension adjusts automatically so the image won't be stretched. Click Resize Image and the tool uses the HTML5 Canvas API to draw the image at the new size inside the browser — no server involved. The result is available to preview and download immediately.
Resizing vs compressing
Resizing changes the pixel dimensions of an image. Compression reduces file size while keeping the same dimensions. Often you need both — resize first to the correct dimensions, then compress to meet a file size limit. For that workflow, after downloading your resized image, run it through our Image Compressor to reduce the KB further. If you specifically need a photo under 20 KB for an exam or government portal, use theResize to 20KB tool which handles both steps automatically.
Frequently Asked Questions
Does resizing upload my image?
No. Resizing is done using the HTML Canvas API directly in your browser. Your image never leaves your device.Can I resize to a specific pixel size?
Yes. Enter the exact width and height you need. Enable "Keep aspect ratio" to prevent distortion.Will the file size change when I resize?
Yes — smaller dimensions generally mean smaller file size. The tool shows you the resulting file size before download.What formats can I resize?
JPG, PNG, WebP, GIF, and most other browser-supported image formats. The output keeps the same format as the input.Can I resize to a target file size like 20KB?
For strict KB targets (e.g. exam uploads), use our dedicated Resize Image to 20KB tool which applies quality-binary-search to hit the target.Is the quality reduced when resizing?
Downscaling (making an image smaller) is lossless from a quality-per-pixel perspective. We render at 92% JPEG quality, which is visually indistinguishable from the original.