diff --git a/pict-rs.toml b/pict-rs.toml
index e612d83..00ff868 100644
--- a/pict-rs.toml
+++ b/pict-rs.toml
@@ -184,6 +184,16 @@ audio_codec = "aac"
 # default: ['blur', 'crop', 'identity', 'resize', 'thumbnail']
 filters = ['blur', 'crop', 'identity', 'resize', 'thumbnail']
 
+## Optional: set file type for all uploads
+# environment variable: PICTRS__MEDIA__FORMAT
+# default: empty
+#
+# available options: png, jpeg, webp
+# When set, all uploaded still images will be converted to this file type. If you care about file
+# size, setting this to 'webp' is probably the best option. By default, images are stored in their
+# original file type.
+format = "webp"
+
 ## Optional: whether to validate images uploaded through the `import` endpoint
 # environment variable: PICTRS__MEDIA__SKIP_VALIDATE_IMPORTS
 # default: false