Image Resizer
Set new pixel dimensions for a local image.
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Choose an image and enter output width and height. This tool changes pixel dimensions directly; set values that match the aspect ratio if you want to avoid distortion.
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What does an image resizer change?
It creates a copy of an image at new pixel width and height; changing those proportions can stretch or squash the image.
Pixel dimensions are not the same as print size, which also depends on resolution and output settings.
How to resize an image
Pixels, Aspect Ratio, and Image Dimensions
An image's pixel dimensions describe how many pixels wide and tall its raster is. Resizing changes that pixel grid by resampling the image; it does not simply change a physical print measurement. The aspect ratio is width divided by height, so preserving the original ratio keeps the image's proportions. If width and height are changed independently, circles can become ovals and people or objects can look stretched. A larger output does not recreate detail that was absent from a small original, while making an image much smaller can soften fine features. This tool is useful for preparing photos or graphics for an upload requirement, but check the destination's dimensions and preview the result before downloading.
Key Features
💡 Pro Tips
- →To preserve proportions, calculate the second dimension from the original aspect ratio before entering a new width or height.
- →Use the output dimensions required by the destination and retain the original in case you need another size.
Common Mistakes
Entering a new width and height with a different ratio
The image is resampled into the requested shape and may look visibly stretched or compressed.
Upscaling a small image expecting more detail
Resizing can add pixels through interpolation, but it cannot recover detail that the source image never contained.
Last updated: 2026-10-27
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Frequently Asked Questions
Does resizing preserve the original proportions?
The width and height are independently configurable. Use proportional dimensions yourself to avoid stretching or squashing the image.
Does the tool upload my photo?
No. It uses a browser image canvas and a local file preview.
What dimensions should I enter?
Use the pixel width and height requested by the destination. If you want to keep proportions, calculate both from the same aspect ratio.
Will making an image larger add detail?
No. Upscaling creates a larger pixel grid but cannot recover detail that was not present in the original image.