Image Resizer
Resize a photo to the dimensions you need
About Image Resizer
Image Resizer changes the pixel dimensions of a PNG, JPEG or WebP photo directly in your browser. Load a file of up to 25 MB, then type a new width or height. With Keep original proportions ticked, which is the default, editing one side recalculates the other from the original aspect ratio and rounds to whole pixels. Untick it to set both sides freely, which stretches or squashes the picture. Output dimensions can be anywhere from 1 to 12,000 pixels per side, with a ceiling of 24 million pixels in total, so you can enlarge as well as shrink, although enlarging cannot add detail and will look soft. You also pick the output format: PNG is lossless, while JPEG and WebP show a quality slider from 10 to 100 percent, starting at 90. Transparent areas stay transparent in PNG and WebP but are filled with white in JPEG. The result preview shows the new file size before you download, and the saved file is named after the original with -utilzilla added. Your original file is never changed. Animated images are exported as a single still frame.
How to use Image Resizer
- Choose an image using the file picker. PNG, JPEG and WebP files up to 25 MB are accepted.
- Enter a new Width or Height in pixels. Leave Keep original proportions ticked to have the other side calculated for you.
- Pick an Output format and, for JPEG or WebP, adjust the Quality slider.
- Select Create image, compare the result with the original, then choose Download image.
Frequently Asked Questions
Keep the Keep original proportions box ticked. When you change the width, the height is worked out from the original aspect ratio, and the other way round. Unticking it lets you enter any width and height, which distorts the picture if the ratio changes.
Up to 12,000 pixels per side and 24 million pixels in total, for source images and results alike. Source files must be PNG, JPEG or WebP and under 25 MB. Values outside those limits are rejected with an error message.
Usually, because fewer pixels mean less data, but the format matters too. PNG is lossless and can stay large. JPEG and WebP get smaller as you lower the Quality slider. The result preview shows the actual size in KB before you download.
PNG and WebP preserve transparent areas. JPEG cannot store transparency, so transparent areas are filled with white. Choose PNG or WebP as the output format if you need to keep a transparent background.
No. Processing happens on your device in the browser. Download creates a new file named after the original with -utilzilla added, and your original is left untouched. Check the preview before using the result, particularly when enlarging an image.