An R interface to 'Cheetah Grid', a high-performance JavaScript table widget. 'cheetahR' allows users to render millions of rows in just a few milliseconds, making it an excellent alternative to other R table widgets. The package wraps the 'Cheetah Grid' JavaScript functions and makes them readily available for R users. The underlying grid implementation is based on 'Cheetah Grid' <https://github.com/future-architect/cheetah-grid>.