content-type to be used for uploading svg images to AWS S3

For those using an SDK, here's an example code snippet that I used to solve this problem. Im using Javascript (NodeJs). This is to complement the accepted answer above, which is to explicitly define the ContentType as 'image/svg+xml' from the params before uploading.

const params = {
    Bucket: 'bucket', 
    Key: 'key', 
    Body: stream,
    ACL: 'public-read',
    ContentType: 'image/svg+xml',
 };
s3.upload(params, function(err, data) {
  console.log(err, data);
});

As you mentioned, the correct Content-Type for SVG files is "image/svg+xml".

Even if the AWS console does not provide that value in the Content-Type selection field, you can enter it anyway and S3 will accept it.

AWS specifies the following in their API docs for the Content-Type header:

A standard MIME type describing the format of the contents. For more information, go to http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.17.

Type: String

Default: binary/octet-stream

Valid Values: MIME types

Constraints: None

For additional details see http://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectPUT.html