Sharpen Image

Upload a slightly soft or blurry image and apply sharpening to bring out detail and crispness. Adjust the strength slider to control the intensity. The tool uses an unsharp mask algorithm, which enhances edges and fine detail by increasing the contrast between adjacent pixels.

Unsharp masking works by creating a slightly blurred copy of the image, then comparing it to the original. Wherever the blurred version differs from the original, the tool amplifies that difference. This boosts edges, textures, and fine details while leaving smooth areas mostly untouched.

The most common use is rescuing slightly soft photos, images that are almost sharp but not quite, often caused by minor camera shake, slow autofocus, or shooting through glass. Scanned documents and old photographs also benefit from sharpening to make text and details clearer.

Sharpening is also useful after resizing an image. Downscaling a photo can soften it slightly, so applying a light sharpen after resizing restores crispness. Product photographers routinely sharpen images as a final step before publishing to ensure every detail is visible.

Too much sharpening creates visible bright halos around edges and makes the image look crunchy and unnatural. Noise and grain are also amplified by sharpening, so images with visible noise will look worse with heavy sharpening. The key is to sharpen just enough to improve clarity without introducing artefacts.

Start with a low strength and increase gradually while watching the preview. Zoom in to 100% to check for halos around high-contrast edges. If you see bright outlines forming around dark objects, you have gone too far. Dial it back until the edges look clean.