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Image Resizer

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Change the pixel dimensions of a JPG, PNG or WebP image. Adjust width and height, review the preview and download the resized image.

Processed on your deviceFree · No account needed

Preparing your tool…

A visual example

Smaller dimensions, the same proportions

Keep the aspect ratio locked when the whole picture should retain its shape.

  1. 1,600 × 900 pxOriginal dimensions
    01

    Start with a wide image

    This example has a 16:9 aspect ratio.

  2. 800 × 450 pxSame 16:9 proportions
    02

    Halve the width

    With proportions locked, entering 800 pixels for width gives 450 pixels for height.

Resizing changes pixel dimensions. Enlarging cannot restore detail that the source never contained.

Illustrative example. Schematic example; illustrated sizes are not a preview of your image or its file size.

How to use it

  1. 1Select an image and enter the target dimensions.
  2. 2Keep the aspect ratio enabled to avoid distortion.
  3. 3Resize and download the image.

A 1,600 × 900 image resized to a width of 800 becomes 800 × 450 with its ratio preserved.

Details & limits

One PNG, JPEG or WebP up to 10 MiB, 20 megapixels and 8,192 pixels per side. Output respects the same pixel limits.

Can resizing recover missing detail?

No. Enlarging creates more pixels, not new real image detail. Browser decoding applies image orientation; export may discard metadata and colour profiles. Check the downloaded image before replacing an original.

Pixel dimensions are different from file size

Width and height control the image's pixel dimensions, while the format and image content affect its byte size. Keep the aspect ratio for proportional resizing, or check the preview carefully when changing both dimensions independently. The tool accepts one still image up to 10 MiB, 20 megapixels and 8,192 pixels per side. Use the image compressor when you need a specific byte limit.

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Still PNG, JPEG, or WebP. Up to 10 MiB, 20 megapixels, and 8,192 pixels per side.

WebP uses lossy compression. Lower quality can make the image smaller and reduce detail. Exports discard metadata; browser colour conversion can affect appearance.