What is the best way to sharpen an image for the web?

Use unsharp mask with a radius of 0.5-1.0, amount of 80-120%, and threshold of 2-4. This adds crispness without introducing visible halos around edges.

What is the difference between unsharp mask and adaptive sharpening?

Unsharp mask applies uniform sharpening across the entire image. Adaptive sharpening analyzes each region and applies more sharpening to edges while leaving smooth areas untouched, producing more natural results.

Can over-sharpening damage an image?

Sharpening is non-destructive in SnapOtter (the original is preserved). However, excessive sharpening creates visible halos around edges and amplifies noise. Use the preview to find the right balance.

Adjustments

Sharpening

Sharpen images using three professional methods: adaptive sharpening, unsharp mask, and high-pass filtering. Includes presets for common use cases like web display, print preparation, and portrait enhancement. Fine-tune radius, amount, and threshold for precise control.

Deploy with Docker View Source

Features

Three methods: adaptive, unsharp mask, and high-pass
Radius, amount, and threshold controls
Presets for web, print, portrait, and landscape
Live preview with before/after comparison
Batch sharpening with consistent settings

What you can do

Sharpen product photos for crisp display on e-commerce sites
Prepare images for print with appropriate sharpening levels
Rescue slightly soft images from smartphone cameras
Apply targeted sharpening to landscape and architecture photography

Self-hosted. Your files never leave your network.

SnapOtter runs entirely on your own infrastructure. Files processed with Sharpening are never uploaded to third-party servers. Deploy a single Docker container and process files with full privacy, no watermarks, and no usage limits. Open source under AGPL-3.0.

Frequently asked questions

What is the best way to sharpen an image for the web?: Use unsharp mask with a radius of 0.5-1.0, amount of 80-120%, and threshold of 2-4. This adds crispness without introducing visible halos around edges.
What is the difference between unsharp mask and adaptive sharpening?: Unsharp mask applies uniform sharpening across the entire image. Adaptive sharpening analyzes each region and applies more sharpening to edges while leaving smooth areas untouched, producing more natural results.
Can over-sharpening damage an image?: Sharpening is non-destructive in SnapOtter (the original is preserved). However, excessive sharpening creates visible halos around edges and amplifies noise. Use the preview to find the right balance.

More Adjustments tools

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Replace specific colors or invert

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Simulate how images appear with color vision deficiency

Learn more Duotone

Apply a two-color duotone effect with custom shadow and highlight colors

Learn more

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