Understanding how carbon travels from land through river networks and into the ocean is essential for understanding the global climate system and the impact of human activities on the environment. While substantial data exist for marine environments, connecting these records with freshwater and riverine data has historically been a challenge. This project set out to bridge this gap by bringing together two key datasets: the newly developed FRACTAL (Freshwater Records and Archives of Carbon Transport through Anthropocene Landscapes) database and the established MOSAIC (Modern Ocean Sediment Archive and Inventory of Carbon) database into a single, unified web platform. By linking these repositories, the project aims to give researchers worldwide an integrated tool to track the pathways and transformations of carbon across the entire land-to-ocean continuum. During this project, we successfully developed the underlying architecture for the FRACTAL database and redesigned the web platform to seamlessly host and query both freshwater and marine datasets within an intuitive, user-friendly interface. We prioritized building a robust, long-lasting data infrastructure—ensuring rigorous version control, secure data management, and smooth navigation. While final testing of live FRACTAL data queries is being finalized, the essential technical foundation is complete, and the unified public web interface will be launched by the end of the year. This open-access resource will empower the broader scientific community to better explore, analyse, and understand global carbon dynamics complying with FAIR and ORD practices, enabling researchers to publish reproducible code that directly queries the database, while ensuring persistent versioning and long-term scientific reproducibility.