Upload any image
Drag and drop or click to upload PNG, JPG, or WEBP images. Processing runs entirely in your browser — nothing is uploaded.
Image Tools
Image Sharpen Tool
Improve blurry or soft images with convolution-based sharpening presets. See before/after side by side — no server upload required.
Choose sharpening preset
Pick from Subtle, Normal, Strong, or Extreme. Each applies a different unsharp-mask convolution strength for portraits, landscapes, or heavily blurred shots.
Download sharp result
Export the sharpened image as a PNG. See before/after side-by-side before downloading.
Click or drag a blurry image here
JPEG, PNG, WebP
How to sharpen an image
Step 1
Upload your image
Click or drag a PNG, JPG, or WEBP image onto the tool.
Step 2
Choose a preset
Select Subtle for portraits, Normal for general use, Strong for landscapes, or Extreme for severely blurry images.
Step 3
Download the result
Click Download to save the sharpened image as a full-resolution PNG.
FAQ
How does the sharpening work?
The tool applies an unsharp mask convolution kernel directly to your image pixels. This enhances contrast at edges, making the image appear sharper without changing its resolution.
Which preset should I use?
Subtle for portraits (avoids halos), Normal for general photos, Strong for landscapes and architecture, Extreme for severely blurry images (runs 3 passes).
Can sharpening fix a severely out-of-focus photo?
Sharpening enhances existing edge information — it cannot restore detail that was never captured. It works best on slightly soft or compressed images rather than heavily out-of-focus shots.
Is my image uploaded to a server?
No. Sharpening uses the browser Canvas API with pixel-level convolution. Your images stay entirely on your device.