About This Tool
Sharpen Image increases contrast along existing edges to make some images appear clearer. It can improve how details look, but cannot restore information that was never captured.
How to Use
- Choose or drop an image and check its orientation, file size, and pixel dimensions.
- Set the sharpening strength, choose the output format, and adjust quality or the background color where available.
- Click “Apply changes” to compare the original and result, including actual pixel dimensions and file size.
- Download when you are satisfied. “Reset settings” restores the default effect; “Clear” removes the files and results.
Settings explained
- Sharpening ranges from 0% to 100% and defaults to 0%. At 0%, no sharpening is added; 100% applies the full effect.
Supported Formats
- Input: JPG/JPEG, PNG, or static WebP. GIF, animated PNG, and animated WebP are not supported.
- Output: JPG, PNG, or WebP if supported by your browser. Most edits keep the input format by default; opacity and rounded-corner tools default to PNG.
Image Processing Notes
Changes apply to the full original image and keep its loaded pixel width and height by default. The preview may appear smaller; the downloaded file contains the full processed image.
- Strong sharpening can amplify noise or create light and dark halos along edges. Start with a low strength.
- Large images may take longer to sharpen. Wait for processing before downloading; the result still uses the full original pixel dimensions.
- Original transparency is preserved. Sharpening does not make transparent edges opaque.
- Downloads contain the full processed image. Saving again can change file size and compression details, and usually removes original EXIF, GPS, and similar information. Keep your original file.
Each image can be up to 100 MiB. Files over 50 MiB trigger a high-memory-use notice. Original and output images are limited to 16 megapixels, with each dimension no greater than 16,384 pixels. Some operations have lower limits; resize the image first if prompted.
Privacy
Images are processed entirely in your browser and are never uploaded to a server.
Files are not saved automatically. Download any results you want to keep before clearing or leaving the page, and keep your original file.
FAQ
Can sharpening restore lost detail?
Not truly. Sharpening enhances existing edge contrast; it does not recover information that was never captured or has already been lost.
Why does strong sharpening create light or dark outlines?
Increasing edge contrast can produce halos, especially around high-contrast outlines. Reducing the strength usually helps.
How is sharpening different from enlarging?
Sharpening enhances edges without changing pixel dimensions. Enlarging adds pixels to the width and height. Neither automatically creates real new detail.
Will the download keep the original dimensions?
The tool preserves the loaded image’s pixel dimensions. A smaller preview does not make the download smaller. Output format and quality can still affect file size and detail.