Resize Image Online — Change Dimensions for Free
Whether you're preparing a photo for a website, an ad platform with strict dimension requirements, or just shrinking a huge camera photo down to something manageable, this tool resizes images to exact pixel dimensions directly in your browser. Nothing is uploaded — resizing happens instantly using your browser's own Canvas engine.
JPG, PNG, WebP, HEIC, SVG · processed entirely on your device
Resize Image Online — Change Dimensions for Free
Whether you're preparing a photo for a website, an ad platform with strict dimension requirements, or just shrinking a huge camera photo down to something manageable, this tool resizes images to exact pixel dimensions directly in your browser. Nothing is uploaded — resizing happens instantly using your browser's own Canvas engine.
Enter a target width, and, if you want independent control, a target height. With "Lock aspect ratio" checked (the default), the height is calculated automatically from the width so your image never looks stretched or squashed — just leave the height field blank. Uncheck it if you specifically need to force an exact width and height, for example to match a fixed-size template or ad slot, accepting that this may distort the image slightly.
Resizing down (making an image smaller) always looks clean. Resizing up (making an image larger than its original resolution) will soften detail somewhat, since the tool can only estimate new pixels rather than invent real detail — this is a limitation of any resizing tool, not specific to this one. You can resize a single photo or drop in a whole batch; multiple images are each resized to the same target dimensions and bundled into one zip for download.
Common questions
When checked, the tool calculates the height automatically based on your target width (or vice versa), keeping the image's original proportions so nothing looks stretched. Uncheck it only if you need an exact width and height regardless of distortion.
Yes, but enlarging an image beyond its original resolution will soften fine detail, since new pixels are estimated rather than captured. For best results, avoid scaling up by more than roughly 2x the original size.
No — the output keeps the same general image type as the input by default. If you also need to change the file format, use one of our conversion tools after resizing.
Yes — drop in multiple files and each will be resized to the same target width and height you set, then bundled into a single zip download.
Usually yes, since fewer pixels generally means a smaller file, but resizing optimizes for dimensions, not file size. Use our Compress Image tool afterward if you need to shrink the file size further.