Sæby Church is a small, towerless Romanesque ashlar church consisting of a chancel and nave. At the east gable stands a bell frame with two bells – one dating from the 15th century and the other from 1996, hanging side by side as a beautiful symbol of past and present.
The church was restored in 1951, during which the porch was added and several original Romanesque windows were reopened. Both original portals are preserved, though the northern one is now bricked up.
Inside, the space is defined by a well-proportioned chancel arch with profiled corbels. The altar front, featuring paintings of Christ and Saint Peter, dates from 1656. The altarpiece is Renaissance, but the painting – created by Ingolf Røjbæk – was added in 1952. An older altar painting depicting the Last Supper also hangs in the church.
The pulpit dates from 1593, though its style appears older, in Late Gothic design. Two Gothic carved wooden figures, Christ and Saint Michael, were returned to the church in 1996 after being held by the National Museum.