Raster Calculator & Band Math

Upload a multi-band GeoTIFF, pick two bands and an operation, and see the computed result as a colored map overlay. Free, runs entirely in your browser: the file never leaves your computer.

Upload a .tif/.tiff file with two or more bands, pick Band A, Band B, and an operation, and get the computed band back — as a colored overlay on the map and as a downloadable GeoTIFF.

Tip

Private by design. Your file is processed entirely in your browser (Python via WebAssembly) — it’s never uploaded to any server, including ours. Nothing to configure, nothing to trust: the code never gets the chance to see your data.

The code itself isn’t shown here — it’s a fixed, non-editable computation using rasterio/numpy underneath. Want to see the same computation built up step by step, in Python and R? Read Raster Band Math.

First run loads the Python engine — expect about a minute. Instant after that, and again each time you come back to this page.

Second tool in the Raster family. Read the companion article for the same computation in Python and R, one cell at a time, or start from Raster Inspector if you just need to see what’s in a file first. Working with vegetation imagery specifically? Try the NDVI Calculator — the same Normalized Difference operation above, with red/near-infrared band presets and a vegetation color scale.