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Solvent\u2010free strategies have emerged as attractive alternatives, not only for reducing the use of conventional solvents but also for creating distinct reaction environments for framework formation, crystallization, and materials processing. Mechanochemical activation, ionothermal media, melt\u2010 or flux\u2010assisted polymerization, and vapor\u2010assisted interfaces provide different modes of molecular transport and reaction regulation, thereby influencing bond formation, nucleation, crystal growth, and morphology evolution. This minireview summarizes recent advances in these strategies, with particular attention to their reaction characteristics, structural scope, and applicability to different COF systems. Selected approaches further enable the integration of framework construction with direct shaping into films, membranes, monoliths, foams, and platelets, as well as gram\u2010 to kilogram\u2010scale production. 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