Blur (Mosaic)

Last updated: January 8, 2026

Blur

You can apply a Gaussian blur effect to an image. It’s useful for placeholder previews, masking sensitive information, or softening backgrounds.

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blur

Description

Sets the Gaussian blur strength (sigma). Higher values produce a stronger blur.

Format

?blur={sigma}

Supported values

• Numeric value (sigma)

• Range: 0.3 to 20

Examples

Request	Result
?blur=1.5	약하게 블러 처리
?width=800&format=webp&blur=2	800px 리사이즈 + WebP 변환 + 블러

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Using with other options

• Combining blur with width is efficient for creating lightweight blurred thumbnails (previews).

?width=80&blur=8