This research article presents a mid-infrared ultra-broadband and wide-angle nonreciprocal thermal emitter based on Weyl semimetal (WSM) metamaterials. The device operates without an external magnetic field and achieves significant nonreciprocal thermal radiation over a wavelength range from 12 μm to 20 μm, spanning a wide angular range from 16° to 88°. The nonreciprocity is attributed to the strong nonreciprocity of WSMs with different Fermi levels and the epsilon-near-zero (ENZ)-induced Brewster modes. The robustness of the nonreciprocal radiation is confirmed through wavelength-averaged emissivity across a full azimuth angle range from 0° to 360°. The study also explores alternative materials and nanostructures as dielectric layers, demonstrating the flexibility and reliability of the design. This work has potential applications in enhanced radiative cooling, thermal emitters for medical sensing and infrared heating, energy conversion, and thermal management.This research article presents a mid-infrared ultra-broadband and wide-angle nonreciprocal thermal emitter based on Weyl semimetal (WSM) metamaterials. The device operates without an external magnetic field and achieves significant nonreciprocal thermal radiation over a wavelength range from 12 μm to 20 μm, spanning a wide angular range from 16° to 88°. The nonreciprocity is attributed to the strong nonreciprocity of WSMs with different Fermi levels and the epsilon-near-zero (ENZ)-induced Brewster modes. The robustness of the nonreciprocal radiation is confirmed through wavelength-averaged emissivity across a full azimuth angle range from 0° to 360°. The study also explores alternative materials and nanostructures as dielectric layers, demonstrating the flexibility and reliability of the design. This work has potential applications in enhanced radiative cooling, thermal emitters for medical sensing and infrared heating, energy conversion, and thermal management.