How to Resize an Image Online Without Losing Quality
Resizing changes an image's width and height so it fits a website, social post, email attachment, or document. The best result keeps the original proportions and uses dimensions that match the place where the image will appear.
Resize an image in a few steps
- Open the Image Resizer.
- Add a JPG, PNG, WebP, GIF, or AVIF image.
- Enter the target width or height.
- Keep the aspect-ratio option enabled unless you intentionally need a custom shape.
- Choose the output format and quality, then download the resized image.
Why keep the aspect ratio?
The aspect ratio is the relationship between an image's width and height. Locking it prevents faces, logos, and other objects from appearing stretched or squeezed. If you need a square image, crop it first or use a square source instead of forcing unrelated dimensions.
Useful image sizes
Use the dimensions required by the destination rather than enlarging every image. For a website, the displayed width is a useful starting point. For social platforms, check the current size requirements before exporting because they can change.
Resizing versus compressing
Resizing reduces the number of pixels. Compression reduces the file size through encoding. For a faster website, resize an oversized image first and then use the Image Compressor to optimize the result.
Keep the original file
Save the original image before resizing. A smaller copy can be created again, but enlarging a small export later may make it blurry.
Image Resizer ↗