Sharpen Image
Image ToolsApply a sharpening filter to bring out image detail.
What is Sharpen Image?
Sharpen Image runs a convolution filter over your photo to boost edge contrast and pull out fine detail that looks soft or slightly out of focus. An Amount slider lets you dial the effect from subtle to strong and watch the preview update live. Drop in a PNG, JPEG, or WebP and download a lossless PNG — the whole thing runs in your browser, so your image is never uploaded.
How to use Sharpen Image
Add your image
Drag a PNG, JPEG, or WebP onto the drop zone, or click to browse. It loads at full resolution and is decoded locally.
Set the sharpening amount
Drag the Amount slider from 0% to 100%. At 0% the image is untouched; as you raise it, a 3x3 sharpening kernel adds more contrast around edges. The preview refreshes as you slide.
Find the right balance
A little sharpening rescues a soft photo, while too much introduces halos and noise. Nudge the slider until edges look crisp but natural.
Download the PNG
Click Download PNG to save the sharpened image, named after your original file with a -sharpened suffix.
Common uses
- Rescue a slightly soft or out-of-focus photo
- Make text in a scanned document more legible
- Bring out texture and detail in product shots
- Crisp up a screenshot before sharing it
- Add definition to an image that was downscaled
- Emphasize edges in a diagram or chart capture
Why choose Super File Tools
Privacy-first
Most tools process your files inside your browser and never upload them to a server.
Free, no account
No sign-up, no watermark, no paid tier. Just open a tool and use it.
Instant
For local tools, work starts the moment you drop a file — no upload or queue.
Runs in your browser
Most tools are built on open web standards and work on any modern desktop browser.
No upload size caps
For local tools, nothing leaves your device, so the only limit is your machine’s memory.
Yours to keep
Results download straight to your device in clean, standard file formats.