Silver tellurite glasses with melting temperatures < 700 °C were prepared to immobilize the ¹²⁹I that normally volatilizes during high-temperature melting. Glasses have densities of 6.31 ± 0.1 g/cm³ and transition temperatures of 165 ± 3 °C that provide thermal stability at the disposal site. Iodine waste loading in glasses was as high as 12.64 wt.% of all metallic elements and 11.21 wt.% including oxygen. Normalized elemental releases obtained from the product consistency test were well below US regulation of 2 g/m². Iodines are surrounded by four Ag⁺ ions forming [Ag4I]³⁺ units that are further connected to tellurite network through bonds with non-bridging oxygens.