Sharpen Image
Bring out edges and detail with a sharpen pass.
Runs in your browser, nothing is uploadedFree, no signupNo watermark
Drop an image here
or click to choose one. It never leaves your device.
Three steps
How to use the sharpen image
- 01
Add a slightly soft photo
Drop in an image that needs a little more definition.
- 02
Apply a small amount
Nudge the slider up and watch the edges. A little goes much further than it looks.
- 03
Download
Keep the amount low enough that edges do not develop bright halos.
Why this one
What makes it different
Edge-aware, not global contrast
It increases local contrast at edges rather than raising contrast everywhere, which is what makes the image read as crisper instead of harsher.
A live preview to stop you overdoing it
Oversharpening is the most common mistake, and it is obvious on screen long before it is obvious in a number.
Right at the end of the workflow
Sharpening after resizing is the correct order, and it is why this is a separate step rather than something bundled into the resizer.
How this tool handles your files
- Where it runs
- Your browser, not a server
- Uploads
- None, ever
- Account
- Not required
- Watermark
- Never added
The short version
About sharpen image
Sharpening is the most misunderstood adjustment there is, because its name promises something it cannot deliver. It does not recover focus. What it does is exaggerate the contrast at edges that already exist, which makes a slightly soft image read as crisp, and makes an already-crisp image look brittle and haloed. The useful range is much narrower than the slider suggests.
Questions
Sharpen Image FAQ
Can sharpening fix a blurry photo?
No. Sharpening increases contrast at edges that already exist. If the detail was never captured, because of motion or a missed focus, there is nothing for it to enhance.
How much sharpening is too much?
Once you can see a bright outline along dark edges, you have gone past it. That halo is the signature of oversharpening and it does not go away at smaller sizes.
Should I sharpen before or after resizing?
After. Downscaling softens an image, so sharpening first means sharpening detail that is about to be thrown away, then ending up with a soft result anyway.
Why does my image look noisy after sharpening?
Sharpening amplifies whatever is there, including sensor noise in shadows. On a high-ISO photo, a small amount is the most that will help.
Free, and staying free
The tools are free because the icons are the business.
Thridy is a library of thousands of 3D icons in one consistent style, free for commercial use with no attribution and no account. The tools exist so you never have to upload an image to somebody else's server to resize it.
Keep going
More image tools
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Apply a smooth Gaussian blur by any amount.
Pixelate Image
Pixelate an image or hide part of it in blocks.
Brightness
Brighten or darken an image.
Contrast
Increase or soften the contrast of an image.
Saturation
Make colours richer or more muted.
Grayscale
Convert an image to black and white.