I am using Tableau to do some data representations and the only good quality image export Tableau allows is \*.emf

Unfortunately, the online tool I use to put the report together(Canva) does not support emf format. 

When I convert the file to jpg or png, the quality is drastically reduced :(

How can I overcome this matter? I tried many things such as opening emf in Illustrator and saving back with CMYK colors and 300dpi and such. But nothing seems to keep the crisp quality of the original emf file.