A multiphoton intrapulse interference phase scan (MIIPS) adaptively and automatically compensates the combined phase distortion from a fiber supercontinuum source, a spatial light modulator pulse shaper, and a high-NA microscope objective, allowing Fourier-transform-limited compression of the supercontinuum pulses at the focus of the objective. A second-harmonic-generation-based method is employed to independently validate the transform-limited compression. The compressed pulses at the focus of the objective have a tunable duration of $10.8–38.9\mathrm{fs}$ (FWHM), a central wavelength of $\sim 1020\mathrm{nm}$ , an average power of $18–70\mathrm{mW}$ , and a repetition rate of $76\mathrm{MHz}$ , permitting the application of this source to nonlinear optical microscopy and coherently controlled microspectroscopy.