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Change an image’s dimensions by width, height or percentage, with the option to lock the aspect ratio. Preview before you download.
Last updated 27 August 2026
Drag & drop a file here, or
One image, up to 25 MB
Its current dimensions are shown.
Type a width, a height, or a percentage. Keep “lock aspect ratio” on to avoid stretching.
Check the preview, then save the resized image.
With the aspect ratio locked, setting width to 1200 sets height to 480 automatically. The image is redrawn at the new size on a canvas and exported in its original format.
Shrinking an image is safe — the browser averages pixels together and the result stays sharp.
Enlarging beyond the original size cannot invent detail that was never captured, so a small image scaled up will look soft. For print, start from the highest-resolution original you have.
Not if you keep “lock aspect ratio” enabled. Unlock it only when you deliberately want to stretch or squash the image to specific dimensions.
Match the display size. A full-width hero is usually 1600–2000px wide; a blog image 800–1200px; a thumbnail 300–400px. Resize down to what you actually need, then compress.
No, the output keeps the input format. To change format as well, use one of our converters afterwards.
No. Resizing uses the browser’s canvas and never sends your file anywhere.