Open massive GeoTIFFs—or compare two side by side in your browser.

OrthoViewer is a local-first browser GeoTIFF and orthophoto viewer. No upload required: open one local raster to explore, or two aligned GeoTIFF files to compare with swipe curtain or side-by-side layouts. Inspect metadata, navigate large imagery with fluid pan and zoom, run guided map tours, and use fast point, line, and area annotation measurement with GeoJSON import and export for GIS workflows.

• Browser-local GeoTIFF processing—single file view or dual-file comparison
• Swipe and side-by-side modes for aligned orthophotos and rasters
• MapLibre tiled raster navigation
• Efficient point, line, and polygon annotation measurement
• Map tours with optional comparison playback and video export
• GeoJSON import and export for annotations and overlays