Sharpen
Unsharp-mask sharpening with a live before/after comparison.
Drop an image here
or click to browse — processed on this device
You can also paste from the clipboard.
Frequently asked questions
Can sharpening fix a badly out-of-focus photo?
It can rescue slightly soft images by strengthening edge contrast, but it can't recreate detail that was never captured — a heavily blurred photo will stay blurred. Start with the Medium preset and judge in the before/after view.
What do amount, radius and threshold do?
Amount is the strength of the effect. Radius is how wide an area around each edge gets enhanced — keep it low (1–2) for fine detail. Threshold protects smooth areas like skin and sky from turning grainy; raise it if noise appears.
Why does the preview update faster than the download?
Sliders run on a smaller working copy for instant feedback, and the full-resolution version renders in the background a moment later — the Download button always gives you the full-size result.
Are my images uploaded to a server?
No. SqueezePix runs entirely in your browser — files are opened and processed on your own device and never transmitted anywhere. You can even load the page, go offline, and keep working.