Electronic records are merely series of bits without understanding the formats of content files. There are numerous types of formats and also possibilities of extinction. For long term preservation, it is essential to understand and manage formats. In addition to managing format itself, accurate information on the format needs to be stored for electronic records. In this study, various types of electronic files, without checking with the naked eye, has developed a tool to extract the header information in the format of electronic files with the file extension validation tool to compare format and validate digital component.