This paper talks about MARC standard and contemporary formats for bibliographic description. The purpose of this paper is to establish and compare options of bibliographic description of library material using MARC format, apropos XML and JSON, and to propose a better format, as well as a process of converting MARC record to XML and JSON. The main aim of this paper is to see into advantages and disadvantages of each format, compare means of recording in each format and emphasize the importance and advantages of using modern formats. Particulars of each format are shown through paper as well as an example of recording in each of formats. Disadvantages of MARC format are especially shown, but advantages of modern formats are emphasized. Research included making of program in programming language Python, while using module called Pymarc, whose purpose is to convert MARC record into XML or JSON format. Research showed that modern formats have an advantage in front of MARC standard which is a bit outdated. Main advantages of modern formats are that they are easy to read and write. The process of converting MARC records into modern formats is not complicated, as it was discovered by creating a conversion program. It is sufficient to have basic knowledge about programming to create such a program and it will serve to its purpose.