Slightly soft photos are everywhere — a missed focus, a phone lens smudge, an upscaled image, a compressed download. Sharpening restores perceived crispness by increasing contrast exactly along edges, and this tool uses unsharp masking: the same technique behind the Sharpen tools in professional editors.
Amount controls how strongly edges are enhanced, and Radius sets how wide the enhancement zone is — small radius (1–2) crisps fine detail like eyelashes and text; larger radius (3–6) adds overall punch and presence. Sharpening cannot re-create information that was never captured, but it dramatically improves how sharp an image *feels*. Free, instant, local.
How to add the sharpen effect to a photo
Tips for the best sharpen look
- Sharpen after resizing, not before — downscaling softens images, so exports destined for social media deserve extra sharpening.
- Watch edges for bright halos: they are the sign you have pushed Amount or Radius too far.
- Text, product shots and eyes benefit from small-radius sharpening; landscapes tolerate a bigger radius.
Sharpen effect — FAQ
Can sharpening fix a truly blurry photo?
It can significantly improve mild softness and make details feel crisp again, but it amplifies edges that exist rather than inventing detail. A severely out-of-focus or motion-blurred photo will improve somewhat, not fully recover.
What is unsharp masking?
A counterintuitively named classic: a blurred (“unsharp”) copy of the image is subtracted from the original to isolate edges, and those edges are then amplified. It came from darkroom technique and remains the standard sharpening method today.
Why do my sharpened photos look grainy?
Sharpening amplifies noise along with detail, especially in photos taken in low light. Use a lower Amount, or add deliberate film grain afterward — uniform grain often looks better than amplified sensor noise.