CRS Converter
Convert coordinates between reference systems: single point, CSV, and multi-sheet Excel files with per-sheet CRS, plus reprojection of already-loaded vector layers.
CRS Converter is a QGIS plugin for converting coordinates between coordinate reference systems (CRS). It supports manual entry of a single point, import/export of CSV files, and import/export of multi-sheet Excel (.xlsx) workbooks with automatic detection of X/Y columns and an individual source CRS per sheet. It can also reproject a vector layer already loaded in the current QGIS project and add the result to the project as a new layer. When the target CRS is geographic, coordinates are also displayed and exported in degrees-minutes-seconds (DMS) format. A detailed error log (.log) can be generated for CSV and Excel conversions, and a contextual Help button is available on every tab.