Image

Resize Image Pixels Online

Resize an image to exact pixel dimensions, with the aspect ratio locked by default so it doesn't stretch.

Click to upload or drag and drop an image here

Upload an image to see its original pixel dimensions.

How to use the image resizer

  1. Upload a JPG, PNG or WebP image.
  2. Enter an exact width or height in pixels, or choose a quick 25%, 50%, 75% or 100% scale preset.
  3. Keep aspect ratio locked to prevent stretching, then resize, preview and download.

Resize image pixels without stretching

Enter the exact pixel width or height you need and keep the aspect-ratio lock enabled to preserve the original proportions. This is useful for profile pictures, website images, application forms, thumbnails and other uploads that require specific dimensions.

Common image resizing tasks

You can reduce large photos for faster web pages, resize a picture to a required pixel width, or create a smaller copy for online forms. Pixel resizing changes the actual image dimensions; it is different from changing DPI metadata for printing.

Features

  • Lock or unlock aspect ratio
  • Preserves PNG transparency
  • Side-by-side before/after preview
  • Runs entirely on-device via the Canvas API

Pixel dimensions, aspect ratio and image quality

Width and height describe the actual pixel dimensions of an image. Keeping the aspect ratio locked prevents the picture from being stretched or squashed when one dimension changes.

Reducing dimensions usually lowers file size and is ideal for websites, profile pictures and forms. Enlarging a small image cannot create missing detail, so very large upscales may look soft even though the new pixel dimensions are correct.

Frequently asked questions

Making an image larger than its original size can soften detail, since the extra pixels are interpolated rather than newly captured. Shrinking an image generally stays sharp.

Yes, PNG files keep their transparency when resized; JPG files don't support transparency.

Related tools

Resize for where the image will be used

Downscaling is usually safe when the destination only needs a smaller image, but upscaling cannot recreate missing detail. For websites, choose dimensions close to the largest size the image will actually display.

  • Keep aspect ratio locked unless you intentionally want stretching.
  • Use crop when you need a different shape without distortion.
  • For text-heavy screenshots, preview the resized result before publishing.

Related reading: JPG, PNG, WebP and HEIC: choosing an image format