Dimensions and file size are different
Pixel dimensions describe the width and height of an image. File size describes how much storage it uses. A 1200 × 630 image can have different file sizes depending on its contents, format and compression. Reducing dimensions often reduces file size, but it does not guarantee a particular number of kilobytes.
Resize step by step
- Keep your original image as a backup.
- Open the Toolbox and choose a JPG, PNG or WebP under 15 MB.
- Set the width or height. Leave Keep aspect ratio selected to avoid stretching.
- Choose an output format and, for JPG or WebP, a quality setting.
- Select Prepare download, then Download image.
- Open the downloaded result and check clarity, dimensions and appearance.
Choose a format
JPG is useful for photographs when transparency is not required. PNG preserves transparency and is useful for graphics, but may produce a larger file. WebP supports modern web workflows, although export support varies by browser. The tool reports the browser’s actual output format.
Understand the limits
JPG fills transparent areas with white. Increasing dimensions cannot restore detail absent from the original. Canvas export can discard metadata. The tool accepts input up to 40 megapixels and limits output to 6000 pixels per side and 24 megapixels total to reduce memory pressure. Very large images can still fail on devices with limited memory.
Selected images are processed locally by the tool and are not uploaded by it.