Tin hydrides have played an important role in the development of radical chemistry. Despite their comparatively late discovery as reagents for radical reactions in the late 1950s, they have since then had a tremendous impact.
After a short historical introduction including two milestones in tin hydride radical chemistry, an overview is given of the manifold applications tin hydrides are useful for. Starting from the preparation of the classic tin hydrides, new variants are presented along with their advantages over the traditional reagents. In relation to simple radical reductions, for which tin hydrides are popular reagents because of their hydrogen‐donor abilities, we show which functional groups are suited for the tin‐mediated generation of radicals. If those radicals are not immediately reduced by the tin hydride, a large number of group transformations can be performed ranging from simple cyclizations to complex rearrangements or domino reactions.