Image Resizer guide
How to Reduce Image Size Without Excess Blur
Remove unnecessary pixels first and use the highest JPEG quality that still meets the required maximum size.
What the resize controls change
- Remove unnecessary pixels first and use the highest JPEG quality that still meets the required maximum size.
- Open the result at full size and inspect sharp edges, small writing, faces, and compression blocks.
Why image size cannot always be controlled independently
A KB target is an upper bound, not a guarantee of exact byte equality. JPEG cannot retain transparency.
FAQ
Can every image be reduced to an exact KB value without changing appearance?
No. File size depends on pixel dimensions, format, and encoding. Reaching a strict size target can require reducing dimensions or quality.
What is the current input limit for Image Resizer?
JPG, JPEG, PNG; One JPG/JPEG/PNG ≤25 MiB, ≤16,384 px/side, ≤40 MP.
What does Image Resizer create?
target is an upper bound, exact byte equality not guaranteed; transparent pixels may need a background for JPEG; Encoded image.