In the title compound, C(12)H(12)O(4), the hydr-oxy O and the C and O atoms of the acetyl group are almost coplanar [maximum deviation = 0.0356 (1) Å] with the benzene ring. The dihedral angle between the benzene ring and the plane through the non-H atoms of the methacrylo-yloxy group is 86.1 (1)°. In the crystal structure, mol-ecules are linked by two C-H⋯O hydrogen bonds, forming dimers with graph-set descriptor R(2) (2)(16). A strong intra-molecular O-H⋯O hydrogen bond is also observed.