As of January 9, 2018, Google Fonts had 848 font families, 134 of which are sans serif faces. Of those, 22 can handle Hanyu Pinyin with tone marks.

• Alegreya Sans



• Alegreya Sans SC



• Andika



• Archivo



• Arimo (most recent as of Jan. 2, 2018)



• Athiti



• Fira Sans



• Fira Sans Condensed



• Fira Sans Extra Condensed



• Kanit



• Mitr



• News Cycle



• Noto Sans



• Pattaya



• Prompt



• Saira



• Saira Condensed



• Saira Extra Condensed



• Saira Semi Condensed



• Source Sans Pro



• Ubuntu



• Ubuntu Condensed