A plugin that provides a method for manually editing and saving/loading UBL meshes.
OctoPrint-UBLMeshEdit
UBL Mesh Editor can be used to view, edit and manage Marlin Unified Bed Leveling (UBL) meshes.
See the plugin repository for the most up to date information and features: https://github.com/The-EG/OctoPrint-UBLMeshEdit
Note: this is only intended for UBL. This plugin will attempt to show and provide basic functionality for ABL meshes, but some features will be disabled and others may not function as expected.
For issues and feature requests, check the issues on GitHub and create one if needed.