URLTO GUIDE
Understand proportional resizing without distortion
Both dimensions use one scale when a limit applies. Calculate why output height differs from its maximum.
URLTO editorial · Updated
Image resizing · series03 / 10
Input and processing example
Compare it yourself · Illustrative example
원본 / Original: 1200 × 800 최대 / Maximum: 900 × 900 비율 / Scale: 0.75 결과 / Result: 900 × 600
Steps to verify
- Check the original ratio.
- Read both output dimensions.
- Compare text and logo shapes.
How to interpret the result
Scaling width to 75% also scales height to 75%. Integer-pixel rounding can produce slight ratio differences for some sizes.
Deciding what to do next
Use proportional output rather than forcing both dimensions. Review padding or cropping as separate work.
Feature scope
Downsize PNG, JPEG and WebP proportionally in the browser without upscaling. Inputs are bounded by 20 MB, 20 megapixels and 8192px per side; metadata and animation are not preserved as originals.
Frequently asked questions
Must output fill the height maximum?
It is an upper bound and can remain smaller to preserve proportions.