Large-area　graphene　thin　films　are　prized　in　flexible　and　transparent　devices.　We　report　on　a　type　of　glassy　graphene　that　is　in　an　intermediate　state　between　glassy　carbon　and　graphene　and　that　has　high　crystallinity　but　curly　lattice　planes.　A　polymer-assisted　approach　is　introduced　to　grow　an　ultra-smooth　(roughness,　＜0.7　nm)　glassy　graphene　thin　film　at　the　inch　scale.　Owing　to　the　advantages　inherited　by　the　glassy　graphene　thin　film　from　graphene　and　glassy　carbon,　the　glassy　graphene　thin　film　exhibits　conductivity,　transparency,　and　flexibility　comparable　to　those　of　graphene,　as　well　as　glassy　carbon-like　mechanical　and　chemical　stability.　Moreover,　glassy　graphene-based　circuits　are　fabricated　using　a　laser　direct　writing　approach.　The　circuits　are　transferred　to　flexible　substrates　and　are　shown　to　perform　reliably.　The　glassy　graphene　thin　film　should　stimulate　the　application　of　flexible　transparent　conductive　materials　in　integrated　circuits.