Resize and compress an image for the web

Choose the dimensions you actually need

Resize Image changes the number of pixels in an image. Compression changes how those pixels are encoded. For a website upload, first check the destination’s required dimensions and file-size limit. A smaller preview on screen does not mean that the downloaded image has fewer pixels.

Select an image, choose pixel dimensions or a percentage, and keep Keep proportions enabled when you want the original shape. For example, a 1600-by-900 image reduced to 800 pixels wide becomes 800 by 450 with its proportions preserved. This example describes geometry, not a promised file size.

Resizing upward adds pixels but cannot recreate detail missing from the original. If you need a different shape, Crop Image lets you choose the area to keep instead of stretching the picture.

Pick a format for the image’s purpose

• JPEG: useful for photographs when transparency is not required. Lower quality can reduce file size but may introduce visible artifacts.
• PNG: useful when transparency or crisp graphic edges matter. A PNG can be larger than a photographic JPEG.
• WebP: useful for web delivery when the receiving website accepts it. Check the destination’s accepted formats before converting.

The image controls show a Quality setting for JPEG and WebP output. PNG has no equivalent lossy-quality slider here. Choose a format explicitly; renaming a file extension does not change its encoding.

Compare the result and download the full output

1. Check the displayed output dimensions after adjusting the resize settings.
2. Compare Original and Result, looking at faces, text, small edges and any transparent areas.
3. Select the download button for your chosen format.
4. Open the downloaded file and check its actual dimensions and size against the destination’s requirements.

The preview is scaled for speed. Downloads use the full output dimensions. These image tools process files in your browser; larger images still use memory and processing time on your device.

Reduce the file size without guessing

If the dimensions are right but the file is still too large, open the downloaded result in Compress Image. Compare quality settings and inspect the output rather than relying on a guaranteed percentage reduction. An image that is already efficiently encoded may not shrink much.

Keep a copy of the original so you can try a different output later. For a format-only change, use Convert Image. See Help for supported uploads and limits, and Privacy & data use for the difference between browser image processing and server document processing.