format

Format Conversion

Format & Quality

Weekerp CDN allows you to change the output format and adjust compression quality at request time. This helps reduce bandwidth usage, improve page loading speed, and ensure browser compatibility.

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format

Description Specifies the output format of the image. If not specified, the original format is returned as-is.

Format

?format={type}

Aliases

• f (short form)

• format (full form)

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Supported Formats

Format	Description	Feature
webp	High-efficiency compression format	Supported by most modern browsers
avif	Next-generation high-efficiency format	Higher compression ratio than WebP
jpeg, jpg	Common lossy format	Balanced compatibility
png	Lossless compression format	Supports transparency
gif	Animated image format	Suitable for simple animations
tiff	High-quality format	Used for printing or archiving
svg	Vector format	Ideal for logos and icons

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Examples

Request	Result
?format=webp	Converted to WebP
?format=avif	Converted to AVIF
?f=png	Converted to PNG

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quality

Description Adjusts the quality of lossy image formats. Lower values reduce file size but decrease image detail.

Format

?quality={1~100}

Alias

• q

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Examples

Request	Result
?q=90	High quality (larger size)
?q=60	Medium quality (default level)
?q=30	Low quality (smaller size)

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Using Together

?format=webp&q=75

• Applies to AVIF, WebP, JPEG, and other lossy formats.

• For PNG and SVG (lossless formats), the quality parameter is ignored.

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MIME Auto Conversion

When a format is specified, the response header Content-Type automatically changes based on the requested format.

Format	Content-Type
webp	image/webp
avif	image/avif
jpeg / jpg	image/jpeg
png	image/png
svg	image/svg+xml

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💡 Tip:

• WebP is supported by most modern browsers and can reduce file size by 25–35% compared to JPEG.

• AVIF offers even greater compression efficiency but may not be compatible with older browsers.