Sharpen Image Online
Enhance details, improve clarity, and fix blurry photos with our easy-to-use image sharpening tool.
Drag & drop your image here or click to browse
Applying sharpening effect...
Original Image
Sharpened Image
How to Use the Image Sharpening Tool
1. Upload your image by dragging and dropping it into the upload area or clicking to browse your files.
2. Adjust sharpening amount using the slider. Higher values create a stronger sharpening effect.
3. Set sharpening radius to control how many surrounding pixels are affected. Lower values sharpen fine details, while higher values affect larger areas.
4. Adjust threshold to determine which pixels should be sharpened. Higher values limit sharpening to edges with greater contrast.
5. Choose sharpening method:
- Unsharp Mask: Standard sharpening technique that works well for most images
- High Pass Filter: Emphasizes edges while preserving overall tone
- Laplacian Sharpening: More aggressive edge enhancement
6. Enable "Preserve Details" to reduce noise amplification during sharpening.
7. Select output format based on your needs:
- JPEG: Best for photographs, smaller file size
- PNG: Supports transparency, better for graphics
- WebP: Modern format with better compression and quality
8. Click "Apply Sharpening" to process your image.
9. Compare the results with your original image and download the sharpened version.
Frequently Asked Questions
Why would I need to sharpen an image?
There are several reasons to sharpen images:
- Improving slightly blurry or out-of-focus photos
- Enhancing details in digital photographs
- Compensating for softness introduced by image compression
- Making text more readable in scanned documents
- Preparing images for printing (printers often soften details)
- Enhancing architectural or product details in professional photography
What's the difference between the sharpening methods?
Unsharp Mask is the most versatile method that works well for most images. It enhances edges by increasing contrast between adjacent pixels. High Pass Filter isolates and enhances edges while preserving the overall tone of the image. Laplacian Sharpening is more aggressive and emphasizes edges more dramatically, which can be useful for technical images or when you need maximum detail enhancement.
What do the different settings mean?
Amount controls the intensity of the sharpening effect. Radius determines how many surrounding pixels are affected by the sharpening (smaller radius for fine details, larger radius for broader features). Threshold sets the minimum brightness difference between pixels that will be sharpened, helping to avoid sharpening noise.
Can sharpening fix very blurry images?
Sharpening can improve slightly blurry images by enhancing edges and details, but it cannot recover information that isn't present in the original image. Severely blurry or out-of-focus images may not benefit much from sharpening. For best results, start with the highest quality image available.
Why does sharpening sometimes increase noise?
Sharpening works by increasing contrast at edges, but it can also enhance noise (random variations in pixel values). The "Preserve Details" option helps reduce this effect by applying intelligent noise reduction during the sharpening process. Using a higher threshold value can also help avoid sharpening noise.
What image formats are supported?
Our image sharpening tool supports most common image formats including JPEG, PNG, GIF, BMP, and WebP. The output can be saved as JPEG, PNG, or WebP.
Is there a file size limit?
Yes, the maximum file size is 10MB. For larger files, you may need to resize or compress the image first.
Is my data secure?
Yes, all image processing happens directly in your browser. Your images are never uploaded to our servers, ensuring complete privacy and security.