Resize Image

No. ToolHero resizes your images right in your browser, on your own device. They’re never sent to a server, so they stay private, and big batches don’t wait on your internet connection.

Percent scales every image by the same amount, so 50% halves the width and the height.

Fit shrinks images until they fit inside a box, keeping their proportions. A landscape and a portrait photo both end up with a longest side of 1920 pixels, for example. Images that already fit stay as they are, unless you allow enlarging.

Exact makes images precisely the width and height you enter. Lock the ratio to keep an image’s proportions.

For websites and email, a longest side of 1920 or 1280 pixels looks sharp on most screens. 1080 pixels suits social media. 3840 pixels keeps photos crisp on 4K displays and in prints up to about A4.

Making an image smaller keeps it sharp: we use high-quality Lanczos resampling, the same kind photo editors use. Making it larger can’t add detail that isn’t there, so enlarged images look softer.

Yes. With nothing selected, Resize applies to every image in your workspace. Select a few first to resize only those. Fit is the best choice for a mix of landscape and portrait photos, because each one keeps its own shape.

An exact width and height with a different shape from the image squashes or stretches it. Lock the ratio, or use Fit, to keep its proportions. We point out images that would be stretched before you apply.

Yes. Pick another size and press Apply changes: each image is made again from its original, so quality never drops from resizing twice. Remove the Resize step from an image to get its original size back, or press ⌘Z (Ctrl+Z) to undo.

JPG, PNG, WebP and AVIF keep their format. GIF and BMP files work too and are saved as PNG. HEIC photos from iPhones are coming soon.