Image Sharpener — Free Online

Sharpen blurry or soft-focus images using unsharp mask processing. Bring back clarity and detail without oversaturating edges.

Drop your image here

JPG, PNG, WebP — Max 10MB

Sharpening Strength: 1.5

Subtle (0.5) Medium (1.5) Strong (3.0)

Deleted immediately after processing. Never stored or shared.

How to Use Image Sharpener

Upload ImageSelect or drag and drop your image file (JPG, PNG, WebP — max 10MB)

Adjust StrengthChoose sharpening strength — 1.5 is medium, good for most images

DownloadSave your sharpened image instantly — no email required

Sharpen Image Online is a free online tool that works entirely in your browser — no signup, no data uploaded, no limits.

Image Sharpener — Free Online — No Software Required

Sharpen soft-focus, slightly blurry, or compressed images using unsharp mask processing. The unsharp mask technique works by detecting edges in the image and increasing the contrast along those edges, which creates the perception of sharper focus. This is the same technique used in professional photo editing software. Mild sharpening at strength 1.0-1.5 improves slightly soft camera shots without any visible artifacts. Stronger settings at 2.0+ bring out fine texture detail in product photos, document scans, and screenshots. Over-sharpening produces a crunchy look with halos — use the minimum strength that achieves your goal.

Common Uses

Improve soft-focus smartphone photos
Sharpen document scans for better text readability
Enhance product photos for e-commerce listings
Recover some clarity from heavily compressed images

100% Free — No Signup, No Watermark

Tooliby processes your image on our secure server and deletes it immediately after you download. Your images are never stored, never shared, and never used for any other purpose. No account creation, no email verification, no credit card. Just upload and use.

Frequently Asked Questions

We use an unsharp mask algorithm: create a blurred copy of the image, then add the difference between the original and the blur back to the original multiplied by the strength factor.

Strength 1.0-1.5 is a subtle improvement. Strength 2.0-2.5 is noticeably sharper. Above 3.0 introduces visible halos and artifacts around edges.

Sharpening enhances edges that are already present. It cannot recover detail that was never captured. Very blurry images will show artifacts but not meaningful detail recovery.

JPG, PNG, and WebP.

Yes, completely free — no account, no signup, and no payment needed. Open the tool and use it directly in your browser with no limits.