Edit & Effects

Image Sharpen

Sharpen soft or slightly blurry photos with an unsharp-mask filter.

How to use Image Sharpen

  1. Upload your image.
  2. Adjust sharpening amount and radius.
  3. Preview at 100% zoom.
  4. Download the sharpened image.

What is Image Sharpen?

Image Sharpen boosts edge contrast in your photo using a 3×3 convolution kernel, making details, text and outlines pop. Adjust the strength slider to go from subtle enhancement to aggressive sharpening. Great for slightly soft phone photos and scanned documents.

Who is Image Sharpen for?

Photographers rescuing slightly out-of-focus shots, scanners of receipts and documents, e-commerce sellers making product photos snap, and bloggers polishing hero images before publishing.

Why use Image Sharpen?

  • Restores crispness lost after resizing or compression.
  • Adjustable strength for subtle or dramatic effect.
  • Runs entirely in your browser.
  • Preserves original resolution.

When should you use Image Sharpen?

After downscaling a large photo, before printing scanned documents, when preparing product shots, and to enhance text legibility in screenshots.

Is Image Sharpen safe?

All processing runs on the Canvas API inside your browser - no uploads, no data collection.

Tips for best results

  • Start at 0.5-1.0 for photos, higher for text.
  • Over-sharpening creates halos around edges.
  • Sharpen last, after resize and color adjustments.
  • Save as PNG when sharpening text-heavy images.

Frequently asked questions

Can sharpening fix a badly out-of-focus photo?

No - sharpening enhances existing edges but can't invent detail that was never captured. It works best on slightly soft photos, not seriously out-of-focus ones.

Is my image uploaded to a server?

No. Every ImageEditPro tool processes your image directly inside your browser using JavaScript and the Canvas API. Files never leave your device, so your photos stay 100% private - even when you're editing sensitive documents or personal photos.

Is it really free? Any watermark or signup?

Yes, completely free. No account, no sign-up, no watermark, no daily limit. ImageEditPro is supported by unobtrusive ads so you can use every tool as many times as you need without paying.