Icon and favicon size, free, no upload required
Resize any image to exactly 256x256 pixels in your browser. This is the largest standard size in a Windows icon set and a common size for high-resolution favicons and app assets.
256x256 px
1:1 square icon size
No uploads
Files stay on device
Fit, Fill, Stretch
Three resize modes
Dimensions fixed to 256 x 256 px for this page.
Scales and crops to fill exact size. No white space. No distortion. Recommended.
Drop image here to resize to 256x256
JPEG, PNG, WebP, AVIF, HEIC. All processing stays in your browser.
If your image is smaller than 256x256 pixels, the tool will upscale it and show a warning before download. For icons and logos, upscaling can soften edges. Where possible, start from a source of 512x512 or larger and resize down for the sharpest result.
256x256 sits at the top of the standard icon size scale, used when an icon needs to look sharp at large display sizes.
Windows app icons
256x256 is the largest size Microsoft recommends including in an app icon set, ensuring Windows only ever scales down on high-DPI displays.
High-resolution favicons
Used inside ICO files for Windows desktop shortcuts and some Progressive Web App manifest icons.
Discord and chat app assets
A common export size for emoji source files and role icons before final compression to platform limits.
Source for smaller icon sizes
256 divides cleanly into 128, 64, 32 and 16, making it a useful master size for generating a complete icon set.
Need a complete favicon package? After resizing your image to 256x256, use the PNG to ICO tool to bundle multiple sizes, including 16x16, 32x32 and 48x48, into a single favicon.ico file with a ready-to-paste HTML snippet.
256x256 is the largest size in the standard Windows icon set and is especially important on high-DPI monitors, where the operating system displays desktop icons at very large sizes. Including a 256x256 version in your icon file ensures Windows scales the icon down for smaller contexts rather than scaling a small icon up, which would look blurry. Most icon guidelines recommend 16, 32, 48 and 256 pixels as the minimum complete set.
If your image is smaller than 256x256 pixels, this tool will upscale it to fit and a warning will appear before you download. For icons specifically, upscaling a small logo can make edges look soft or pixelated. If your source artwork is small, it is best to start from a vector file (SVG) or a larger PNG, ideally 512x512 or larger, and resize down to 256x256 rather than up.
256x256 is one of several sizes used inside a favicon.ico file, alongside smaller sizes like 16x16, 32x32 and 48x48. Browser tabs use the small sizes, while 256x256 is used for high-resolution contexts such as Windows desktop shortcuts and some PWA icons. If you need a complete favicon package with multiple sizes bundled together, use the PNG to ICO tool after resizing your source image here.
