How to convert image size without losing its metadata?

i use right click image converter to convert images, it does great but i loose the Metadata of the image when gets converted, So can anyone tell me if there is any software that converts the image without loosing the metadata, I am a photographer and i use Nikon camera, all photos have default metadata and i dont... show more i use right click image converter to convert images, it does great but i loose the Metadata of the image when gets converted, So can anyone tell me if there is any software that converts the image without loosing the metadata, I am a photographer and i use Nikon camera, all photos have default metadata and i dont want to loose them by converting them, to lower the size.

The below photo is before conversion and above photo is after conversion.
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