A　novel　difluorocarbene　promoted　single-atom　skeletal　editing　of　2H-indazoles　is　demonstrated　herein.　Ethyl　bromodifluoroacetate　was　severed　as　the　difluorocarbene　source　in　the　current　protocol,　facilitating　the　cleavage　of　the　N−N　bond　via　carbon　atom　insertion.　This　metal-free　ring　expansion　reaction　enables　the　late-stage　diversification　of　indazole　skeletons,　assembling　a　diverse　array　of　functionalized　quinazolin-4(3H)-ones　in　decent　yields　with　excellent　functional　group　compatibility.　©　2023,　Science　China　Press.