From Excel you can Save as or Print to PDF to generate a vector-based rendering of the Excel chart. Using Adobe Illustrator or similar PDFpatible vector editing tool you can open the chart edit and convert to SVGalthough my Mac version of Excel does not support Sunburst charts and there were problems with the fonts which I either resolve by changing fonts in the Excel source file or inside Illustrator italic . I love to see a direct SVG export supported in Excel but I suspect that Microsoft wouldn make that available for Mac users either ;-)