KRL Commuterline, commonly known as Greater Jakarta Commuter rail, or KRL Commuter Line Jabodetabek is a commuter rail system for Greater Jakarta in Indonesia. It was previously known as KRL Jabodetabek. It is operated by KAI Commuter (KAIC/KCI), a subsidiary of the Indonesian national railway company PT Kereta Api Indonesia (KAI). The rail system uses rolling stock of rapid transit standard and operates at high frequency with a minimum headway. In 2019, the average number of Commuterline users per day reaches average of 1.04 million, with the record of the highest number of users served in a day being 1,154,080.

PT Kereta Api Indonesia (Persero) (lit. 'Indonesian Railways (State-owned) Limited', abbreviated as PT KAI or simply KAI) is a major railway operator in Indonesia and one of the public railway companies in the country. It is state-owned and pays track access charges. Its headquarters are located in Bandung, West Java. In 2019, KAI carried 429 million passengers and 47.2 million tonnes of cargo.