Exact dimensions, no upload
Resize a PNG, JPEG or WebP image to exact pixel dimensions while preserving its aspect ratio when requested.
Method
The browser calculates the missing dimension from the original aspect ratio, redraws the source at the target size and exports a new image.
A 2400 × 1600 image resized to 1200 pixels wide becomes 1200 × 800 when aspect ratio is locked.
Use responsibly
Upscaling cannot recreate missing detail. Animated images are flattened. Very large images may exceed the memory available to a mobile browser.
Your image and selected dimensions stay on your device. No file contents or calculation inputs are sent to our analytics system.
Last reviewed: 20 July 2026
Calculation and copy checked for this release.
