XJSTransform is a transformation and compression tool for XML, JSON and SMILES datasets. XML and JSON data transforms include tag, capital, character n-gram and word n-gram substituions. SMILES data transforms include a domain-specific data transform in addition to capital and character n-gram conversions. These transforms also include a variety of data transform variations. The transformed datasets are then compressed with general-purpose compressors (7Zip, BZip2, GZip, PPMd, PPMVC and ZPAQ) and the compression results are computed