How to resize an image
Resizing changes the dimensions of still images and animated GIFs, while compatible self-contained SVG remains vector markup with an updated display size. Aspect-ratio controls determine whether the source proportions are preserved or deliberately changed.
Steps
- 1Choose the sizing method
Select percentage, width, height or a dimension box according to whether the destination specifies a scale, one edge or a bounded area.
- 2Set proportion behavior
Keep proportions linked for a natural resize, or unlink them only when intentional stretching is acceptable.
- 3Review each planned result
Check the resulting dimensions and source-format behavior before processing and downloading the files.
Key decisions
What happens when both dimensions are set with proportions linked?
The values act as a bounding box. Each image fits within it while retaining its own aspect ratio, so one resulting edge may be smaller than the stated bound.
How are GIF and SVG preserved?
GIF frames are resized while their order, timing and loop behavior remain. A compatible SVG retains its vector coordinate system and receives updated intended dimensions.
Before you download
Know the limits
- Reducing dimensions discards pixel detail, while enlarging adds interpolated pixels rather than missing information.
- GIF palette and binary transparency constraints can produce small color or transparent-edge changes after encoding.
- Accepted SVG is sanitized, so active content, animation, embedded images, links, external resources and style markup are removed.
Verify the copy
Common questions
Can I provide only width or height?
Yes. With proportions linked, the missing dimension is calculated independently from each source image.
Does resizing an SVG turn it into PNG?
No. A compatible SVG remains vector markup; the tool updates its intended width and height while preserving its coordinate system.