How to resize an image
- Select Choose files or drop your images on the box.
- Enter a width, a height, or both. Leave one at 0 and it is worked out from the other.
- Or use Scale by percent, for example 50 to make an image half as wide and tall.
- Pick an output format if you want to change it, then download the results.
Fit or fill
When you enter both a width and a height, you choose how the image is placed. Fit inside the box keeps the whole picture and its proportions, so one side may end up smaller than you typed. Fill and crop produces exactly the size you entered by cutting off the edges, centered on the picture. Turn off Keep aspect ratio only when you want to stretch the image on purpose.
Good to know
Images are never made larger unless you turn on Allow enlarging, because enlarging makes pictures blurry. Downscaling is done in steps, which keeps edges crisp. EXIF rotation is respected, so phone photos come out the right way up, and the result has no location data.
Common sizes: 1920 pixels wide for a full-screen web image, 1200 for a blog post, 800 for email, and 150 to 300 for avatars.
Tips
- Resizing is the quickest way to cut file size. A 4000-pixel photo resized to 1600 pixels is often 5 times smaller.
- Ready-made sizes: Instagram, YouTube thumbnail and passport photo.
- To also reach a file size, follow up with the image compressor.
Common questions about image size
Pixel size and file size are not the same thing. Pixels are the width and height you see on screen. File size is how many kilobytes the file takes on disk, and it depends on both the pixels and the compression. Cutting the width in half makes the picture four times smaller in pixel count, and usually shrinks the file by a similar factor. Printing needs more pixels than screens: for a sharp 4 × 6 inch print, aim for about 1200 × 1800 pixels. Web pages rarely need images wider than about twice their display width.
Everything runs on your device. Nothing is uploaded.