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.

`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)

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

Examples

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

`quality`

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

Format

?quality={1~100}

Alias

Examples

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

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.

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`

💡 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.