The scope of the Fluvial Corridor Toolbox (FCT) is fluvial geomorphology at the network scale, sometimes called upscaled hydromorphology. The toolbox enables mapping fluvial corridors and measuring river features from very large datasets. We first developed the toolbox for the case of the French Rhone basin, which is 90 000 km^2 wide. The overall goal of the toolbox is to propose a quantitative application of the river style framework to support evidence based river management and river condition monitoring in the context of integrated river management. This new version of the Fluvial Corridor Toolbox (FCT) started as an effort to implement port the ArcGIS code (Roux et al., 2015) to the QGis platform for promoting open science and sharing our tools with river practitioners. The new version has been completely rewritten and incorporates ideas from Nardi et al. (2018) and Clubb et al. (2017) for improving the calculation of riverscape feature heights above the water level and delineate floodplain through the river network. We also borrowed the concept of swath profiles from Hergarten et al. (2014) as the basis of a new raster-based approach to characterize floodplain features on cross-sections. These new functionalities are based on high resolution DEM and landcover data to produce nested floodplain envelops. Finally, we implemented tiled processing of very large raster datasets after Barnes (2016, 2017). This new version of the FCT also provides a lightweight framework for developing new processing toolchains/workflows.