Online social networks (OSNs) are becoming more prevalent in daily life, but because all well-known OSNs are centralised, there are some management, security, and privacy issues that need to be addressed. Decentralised architecture based on blockchain technology gives us the ability to solve the issues. This article creates and illustrates the decentralised operation of an online social network service based on blockchain technology. The Interplanetary File System (IPFS) allows for the decentralised storage of a sizable amount of normally required data with minimal security requirements. Due to a decentralised autonomous organisation that was created for user autonomy, users can democratically self-manage the OSN.