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Sharpen Image

Image

Adjust edge contrast with live sharpening while keeping the original image dimensions.

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Image

Choose an image or try Examples to start.

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Boost edge contrast. Start low to avoid harsh edges and amplified noise.

Original

Your source image

Source dimensions and file size

Sharpened

Your result appears here

Output dimensions and file size

JPEG inputs export as JPEG at quality 90%. Other formats export as PNG with transparency preserved. File size may increase. Dimensions stay the same.

GIF uses its first frame. SVG is rasterized. Images are processed in your browser.

Boost edge contrast with an adjustable four-neighbor sharpening filter. Upload an image or choose Examples, then adjust Sharpen amount from 0 to 3 for a live preview.

See more about the Sharpen Image

Zero leaves the pixels unchanged. Uniform colors keep their brightness at every setting, though strong sharpening can amplify noise or create harsh edges. JPEG inputs download as JPEG at 90% quality. PNG, WebP, GIF and SVG inputs download as PNG. GIF uses its first frame and SVG is rasterized. Dimensions stay the same, and file size may increase. Download current image saves the encoded preview. Files must be no larger than 20 MiB, 8192 pixels per side and 16 megapixels.

Key features

  • Automatic preview
  • Original dimensions
  • Transparency preserved
  • Local image processing

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Quick answers for Sharpen Image

What does Sharpen amount change?
Upload an image or choose Examples, then adjust the amount from 0 to 3. The preview updates automatically. The filter adds a scaled difference between each pixel and its four direct neighbors. Zero leaves the pixels unchanged, and uniform colors keep their brightness at every setting.
Does changing the slider sharpen the previous result again?
No. Every preview starts from the original pixels. Transparency is preserved, and fully transparent neighbors don’t introduce dark halos. High settings can amplify noise and create harsh edges.
What files and download formats are supported?
Upload PNG, JPEG, WebP, GIF or SVG up to 20 MiB, 8192 pixels per side and 16 megapixels. JPEG downloads use JPEG at 90% quality; other inputs download as PNG. Transparency and dimensions are preserved. GIF uses its first frame, and SVG is rasterized.
How do I save or reset the result?
Download current image saves the encoded preview. It’s disabled while a new preview is processing. Clear removes the image and cancels pending work. File sizes are shown in exact bytes; the result may be larger than the source.