---
title: "imagemagik .png to .jpg with white background"
seo_description: "snippet explaining how to use imagemagik to covert images from .png .jpg and make the transparent parts white"
date: 2022-03-03T21:31:00+01:00
draft: false
snippet_types:
- imagemagik
---

Working on some .png map files today. I needed to covert them to small .jpg's for
uses in [Oblastle](https://oblastle.fun). Problem being by default the transparent part
fills into to black. Here is how to make it white:


```shell
$ ls
us-ak.png
us-al.png
us-ar.png
us-az.png
us-ca.png

$ for file in *.png ; do magick mogrify -format jpg -resize '500' -background white -flatten  $file; done

$ ls
us-ak.png
us-ak.jpg
us-al.png
us-al.jpg
us-ar.png
us-ar.jpg
us-az.png
us-az.jpg
us-ca.png

$ rm ./*.png
```

The important bit being **-background white -flatten**.

[source](https://stackoverflow.com/questions/7943711/change-the-background-of-an-image-in-image-magick)