> For the complete documentation index, see [llms.txt](https://docs.spectrumcustomizer.com/integration/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.spectrumcustomizer.com/integration/api/image-querystring-api/image-encoding.md).

# Image Encoding

## QueryString API

* `format=png\|gif\|jpeg\|webp` determines the format to encode the image as. Defaults to the original format.
* `jpeg.quality=0..100` determines the jpeg encoding quality. Default is `90`
* `jpeg.progressive=true` enables progressive jpeg encoding.
* `jpeg.turbo=true` encodes files faster at the expense of file size.
* `webp.quality=0..100` determines the webp encoding quality.
* `webp.lossless=true` enables lossless webp encoding. Default `false`
* `png.lossless=false` disables lossless PNG encoding. Default `true` unless `png.quality` is specified.
* `png.quality=0..100` determines lossy png quality. Default `100`.
* `png.min_quality=0..100` determines the minimum png quality that must be realized before lossless is used. Default `0`