Sharpen an Image
Boost local edge contrast with adjustable sharpening strength.
Drop your image here
Drag and drop, or choose a file below
JPG · PNG · WEBP
Up to 250 MB · One image at a time
Each image: up to 16 megapixels and 8192 px per side
Exports a full-resolution PNG with transparency. PNG files can be larger than the original.
Original
Choose an image or try the sample to see your preview here.
100% local processing
How to use
- 01
Choose a JPG, PNG or WebP image, or try the local sample.
- 02
Set the sharpening strength between 0% and 300%.
- 03
Process, compare with the original and download the PNG.
Details and tips
How it works
A small neighborhood filter compares each pixel with its four neighbors and boosts the difference. Transparent neighbors are weighted to reduce dark fringes. The original alpha and dimensions are preserved.
Made for everyday images
Improve the appearance of mildly soft screenshots, illustrations and resized photos.
Frequently asked questions
Does this upscale or recover blurred text?
No. It changes local contrast at the original resolution and does not reconstruct missing information.
Are my images uploaded?
No. These tools process image data on your device. Images and encoded text are not saved to your account.
Which images are supported?
JPG, PNG and WebP up to 8192 px per side and 16 million pixels. Pixel-based effects and comparison use a single still frame of animated files. Base64 conversion preserves original bytes and has a 5 MiB file limit.