In some cases, it may be necessary to provide the users automatic downloads of ODI.

These options allow you to set additional URL parameters that sets Content-Disposition HTTP headers such that when user accesses the URL via a browser, the image transformation downloads to their device as a file with appropriate extension.

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###### Note that these parameters are in addition to other transformation parameters.

The parameters are described below:-

Parameter	Description
`delivery`	Set this to `download`
`dl_prefix`	Set this to the name of the download file without the extension
`format`	Mandatory parameter for image downloads to set the format of the file. Do not set this if already set via format option

Example downloadable image URL

The URL below will download a 300x300 image transformation called testimage.jpg to user's device.

<<CDN_HOST>>/api/v1/assets/0c3c6d026858460abc4de1dcb4de15ac/conversions?resize=300,300&delivery=download&dl_prefix=testimage&format=jpg