Smart Image Sharpener
Professional "Unsharp Mask" tool to fix blurry photos. Enhance details with precision radius and threshold controls.
Open Photo
Drag & drop or Click
Sharpen Settings
Higher threshold prevents sharpening of noise/grain.
Professional Photo Sharpening Made Simple
A blurry photo can feel like a lost memory. Whether it's a slight camera shake from a low-light concert, a missed focus point on a fast-moving subject, or simply the softness that comes from cheap lenses, lack of clarity is the #1 enemy of great photography.
In the past, fixing this required expensive desktop software like Adobe Lightroom or Topaz. Our Smart Image Sharpener changes that. We've taken the same industry-standard Unsharp Mask (USM) algorithms used by professionals and rebuilt them to run directly in your web browser.
This isn't just a simple "contrast booster". Our tool intelligently separates details from the background, allowing you to sharpen the eyelashes in a portrait without making the skin look grainy, or clarify the text in a document without creating jagged halos. It is precision engineering for your pixels.
How to Fix Blurry Photos
- 1Upload Your Image
Drag and drop any JPG, PNG, or WebP file. High-resolution images work best.
- 2Adjust 'Amount'
Start by pushing the Amount slider up. This controls the overall strength of the sharpening effect.
- 3Fine-Tune Radius & Threshold
Use 'Radius' to control how thick the edges are, and 'Threshold' to prevent noise from being sharpened.
- 4Compare & Download
Click and hold the 'Eye' icon to see the before/after difference, then export your crisp image instantly.
Why Use Our Sharpener?
Smart Edge Detection
We use gradient analysis to find actual edges (where light meets dark) and target them specifically, avoiding flat areas.
Granular Control
Don't settle for a single "Sharpen" button. Control the Radius, Amount, and Threshold for professional results.
Zero Latency
Powered by WebGL. As you drag the sliders, you see the result instantly—no waiting for a server "processing" bar.
100% Private
Processing happens on your device. We never see, store, or upload your personal photos to any cloud server.
Instant Compare
It's easy to over-sharpen. Use our visual toggle to constantly check your progress against the original image.
Lossless Export
Download in PNG to preserve every pixel of your new detail, or choose WebP for efficient web sharing.
Pro Tips for Best Results
- Less is More: The biggest mistake is over-sharpening. If you see white "halos" or glowing lines around objects, lower the Radius or Amount.
- Use Threshold for Skin: When sharpening portraits, increase the Threshold to 10-15. This tells the tool to ignore subtle skin textures while still sharpening eyes and hair.
- Sharpen Last: If you are resizing or filtering an image, always apply sharpening as the very last step in your workflow to avoid amplifying artifacts.
- Zoom In: Image defects often hide at 100% zoom. Ensure you are viewing the image at actual size when making fine adjustments.
Who is This Tool For?
Photographers
Save shots where the autofocus missed by an inch, or add that final "pop" to your selects.
E-Commerce Sellers
Crisp product photos sell better. Ensure your listing images look professional and high-definition.
Graphic Designers
Prepare assets for print or web where clarity is non-negotiable.
Social Media Users
Fix that great selfie that came out just a little bit soft before posting it to Instagram.
Frequently Asked Questions
How does the Image Sharpener work technically?
Our tool utilizes the 'Unsharp Mask' (USM) technique, the gold standard in digital imaging. Contrary to its name, it sharpens images by creating a blurred ('unsharp') copy of the original, subtracting it from the original to detect edges, and then increasing the contrast along those edges. This enhances perceived detail and crispness without distorting the colors.
What do the 'Radius' and 'Threshold' sliders do?
Radius determines the width of the edge enhancement—higher values make edges thicker and more visible, while lower values are subtler. Threshold sets a minimum brightness contrast required to apply sharpening. A higher Threshold prevents the tool from sharpening random noise (grain) in smooth areas like clear skies or skin.
Can this tool fix a completely out-of-focus photo?
It can drastically improve photos with soft focus or slight motion blur (e.g., camera shake). However, it cannot miraculously reconstruct details that never existed in the raw data, such as a completely unrecognized blur. Think of it as 'enhancing clarity' rather than 'inventing reality'.
Is my photo uploaded to a cloud server?
No. Security is our priority. All processing happens locally within your web browser using WebGL and Canvas technology. Your personal photos never leave your device, making this safe for confidential documents or private family photos.
Why does my image look grainy after sharpening?
Grain (noise) appears when the 'Amount' is too high or the 'Threshold' is too low. Sharpening algorithms boost contrast, and they can mistakenly boost the contrast of digital noise. To fix this, simply increase the 'Threshold' slider until the smooth areas look clean again.
What are the best settings for portraits?
For portraits, you want to avoid 'crispy' skin textures. We recommend a lower Amount (50-70%), a small Radius (1.0-1.5px), and a moderately high Threshold (8-12). This ensures that eyes and hair are sharp, but skin pores and wrinkles aren't exaggerated.
Does this compare to Adobe Photoshop's Smart Sharpen?
Yes. Our algorithm is mathematically identical to the Unsharp Mask filter found in professional desktop software like Photoshop or GIMP. The difference is that ours runs instantly in your browser without requiring a subscription or heavy software installation.
Is this tool free to use for commercial images?
Absolutely. You can use our Image Sharpener for product photos, real estate listings, or marketing materials with no restrictions, no cost, and no watermarks.
Does it work on mobile devices?
Yes! Our tool is fully responsive and leverages your phone's graphics processor (GPU) to handle image processing. It works perfectly on iPhones, iPads, and Android devices natively in the browser.
What file formats can I export?
You can save your sharpened images as high-quality PNG (lossless), compact JPG, or modern WebP. We recommend PNG if you plan to edit the image further, or JPG if you are posting directly to social media.