How to open a .nc file (Windows, Mac, Linux)

Q: Why can't I open my .nc file?

Usually your computer lacks an app that understands NetCDF. Install one of the apps listed here, or convert the file to a more common format.

A .nc file is a Network Common Data Form. If double-clicking does nothing, your computer simply does not have an app that reads NetCDF yet. Here is how to fix that on each operating system, using free software wherever possible.

Open a .nc file step by step

Confirm the file really is a .nc. Drop it into the WhatFileType file identifier, which reads its signature without uploading anything.
On Windows, open it with Panoply or Python (xarray, netCDF4).
On Mac, use Panoply or Python (xarray, netCDF4).
On Linux, try ncview or Python (xarray).
Still stuck? Convert the .nc to csv, which opens more widely.

Best apps to open .nc files

Windows

Panoply
Python (xarray, netCDF4)
ncview

macOS

Panoply
Python (xarray, netCDF4)
ncview

Linux

ncview
Python (xarray)
Panoply

Before you open it: Safe. NetCDF is a scientific data container read by libraries. It stores arrays and metadata, not code.

Frequently asked questions

Why can't I open my .nc file?

Almost always because no installed app understands NetCDF. Install one of the apps above, or convert the file to a format your existing software already reads.

How do I open a .nc file?

Use Panoply for a visual view, or read it in Python with xarray or the netCDF4 library. ncview gives a quick look on Linux and Mac.

What is NetCDF used for?

Storing large multidimensional scientific arrays, especially climate, weather and ocean data, with the dimensions, units and metadata that describe them.