Image Sharpen
Sharpen soft or blurry photos with adjustable intensity.
100% client-side · no upload
Load a file to begin.
How to use
- Drop your image onto the file picker or tap to select from your device.
- Set the intensity — 1–3 for subtle correction, 4–6 for moderate sharpening, 7–10 for aggressive (may introduce halos).
- Choose output format and quality, then click Sharpen image and download.
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Frequently Asked Questions
- How does image sharpening work?
- This tool uses an unsharp mask algorithm: a convolution kernel that amplifies edge contrast. Each pixel is compared to its neighbours, and differences are enhanced by the intensity factor.
- What intensity should I use?
- 1–3 for subtle correction, 4–6 for moderate sharpening (product photos, scanned images), 7–10 for aggressive sharpening. Over-sharpening at 8–10 may introduce visible halos.
- Should I sharpen before or after resizing?
- Sharpen after resizing. Downscaling softens an image, and sharpening after compensates for that softening. Sharpening before a downscale wastes the effect.
- Is my image uploaded to a server?
- No. Sharpening uses Canvas pixel manipulation entirely in your browser. Nothing is sent to any server.
Last updated: By jarvisbox