WO3 coatings were deposited by the sol-gel technique on microscope slide glass and ITO coated glass. These films were characterized optically, chemically, and structurally by XRD, spectrophotometry, DTA/TGA, SEM/EDAX, and RES. Uniform films of WO3 were dip coated on slide glass at a dipping speed of 5 mm/s. This sample indicated a low near infrared transmittance as a result of coloration using a 0.1 M HCl electrolyte as the H+ ion source. Differential thermal analysis results have allowed the accurate determination of the formation temperature of the WO3 crystalline phase from the gel data in the range of 380-500 degrees C, consistent with the crystallization temperature of the sol-gel film. RES spectrometry was performed on the uncolored sol-gel WO3 film, yielding a chemical composition of WO3.