Unique in architectural style, Khirki Masjid is only one of its kinds. It is a small quadrangle-shaped mosque closed on top unlike the usual style of mosques in which there is an open courtyard for the devotees to offer their prayers to God. Khirki Masjid has beautiful convoluted latticework on its windows, which were principally carved stone screens and can be said to be the precursor of later magnificent Mughal buildings marked by the intricate patterns and delicate façades. The pillars and brackets of the mosque show a heavy native influence, which can be attributed to the ample use of the local artisans, trained in their own schools of architecture. The roof of the Khirki Masjid is divided into squares with groups of small domes on them, through which sunlight found its way to the inner sanctum of the mosque.
The mosque made use of the rubble masonry, which had been plastered externally. There are splendid steps leading up to the place of worship for Muslims built by Khan-I-Jahan Junan Shah, the prime minister of Ferozshah Tughlaq in 15th century. It is believed that it was once his private place of worship. The main significance of the mosque lies in the fact that it is credited to be a link between the late architecture of the Lodhi rulers (the last dynasty of the Delhi Sultanate period) and the highly ornate massive structures of the Mughal architecture.