NextTool

Sharpen Image

How to use

Makes blurry photos look crisper by increasing the detail at edges. Upload your image and adjust the sharpening strength until you are happy with the result, then download it.

Image ToolsLocal only

Step 1 of 3: Upload

  1. 1
  2. 2
  3. 3

Step 1 of 3 · Upload

Select or drag & drop images

Processed on your device

When to use this
  • Crisping up a slightly soft phone photo before posting it online
  • Sharpening a product photo so texture and detail read clearly on a listing page
  • Restoring some perceived detail to an image that lost crispness after resizing
  • Punching up edge definition on a scanned image before printing it

Free and private. Everything runs on your own device, with no account and no uploads.

A slightly soft or blurry photo, from a shaky phone shot or a resized image that lost some crispness, can often be improved with an edge-enhancement filter, and this tool applies an adjustable sharpening kernel entirely in your browser. You control the sharpening strength and preview the effect before exporting.

Sharpening enhances existing edges and fine detail, but it cannot recover detail that was never captured, so very out-of-focus photos will still look soft, just with more contrast at existing edges.

Yes, pushing the intensity too high can introduce visible halos and noise around edges, so it is best adjusted while watching the live preview.

JPEG, PNG, and WebP images are all supported.

No, sharpening uses a standard convolution filter applied via canvas, so it is fast and works on any device without a GPU.

How it works
  1. 1

    Upload the photo

    Select the image you want to sharpen.

  2. 2

    Adjust the sharpen intensity

    Move the slider to increase or decrease the strength of edge enhancement.

  3. 3

    Preview the effect

    Compare the sharpened preview against the original to avoid over-sharpening artifacts.

  4. 4

    Download

    Export the sharpened image once you are happy with the result.

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Read about this
Rotate, flip and sharpen: the small fixes, and which ones cost quality4 min
Pro tips
  • ·Increase intensity gradually and check the preview closely, overshooting introduces visible halos around edges
  • ·Apply sharpening as the last step in your workflow, after resizing or compressing, since those operations can soften edges again
  • ·Skip heavy sharpening on already-noisy or high-ISO photos, since it tends to amplify grain along with detail