Welcome to nFITSview page!

The latest version (3.5) of nFITSview for Windows 64-bit to download:

The latest version (3.5) of nFITSview for Linux 64-bit (Debian-based) to download:

The dependencies for installing in Linux are:

llibboost-iostreams1.83.0 (>= 1.83.0)
libc6 (>= 2.34)
libgcc-s1 (>= 3.0)
libgomp1 (>= 4.9)
libpng16-16t64 (>= 1.6.2)
libqt6core6t64 (>= 6.6.0)
libqt6gui6 (>= 6.1.2)
libqt6network6 (>= 6.1.2)
libqt6widgets6 (>= 6.1.2)
libstdc++6 (>= 14)

About nFITSview (next FITS viewer)

nFITSview - A user-friendly FITS image viewer

Currently nFITSview supports the following formats and features:

8-bit images
16-bit integer images
32-bit floating point and integer images
64-bit floating point and integer images
Exporting image HDUs as PNG/TIFF/JPEG/BMP files
Bulk exporting of all image HDUs as PNG files
RGB gamma correction, grayscale and “Eye Comfort” filters
Filtering by pixel threshold value
Image zoom in/out
HDU header syntax view
Raw data hex preview
Both regular and compressed (.fz) FITS files are supported
Command line exporting of FITS file (see -h, -e command line switches)

Note: the console output is not visible on Windows platform. The command line supports image exporting only in “Original” mapping mode.

How to build under Linux

The original development of nFITSview is done under Linux, so the easiest and the fastest way to build is under Linux.

Just build in Qt Creator.
It should be also possible to build using CMake from the command line. Run the following cmake commands:
```
  cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_CXX_FLAGS_RELEASE="-O3 -DNDEBUG" -B build -S .
  
  cmake --build build
```
The nfitsview execuatble will be located in the build directory.

How to build under Windows

Normally there is no need to build under Windows as the install package is provided. Anyway, for building under Windows one would need to download/install/build all the dependencies (boost, zlib, libpng), then fix the corresponding pathes for the libraries in the CMakeLists.txt file and then build the project using Qt Creator.

Screenshots

nfitsview3_5_screenshot_8 nfitsview3_5_screenshot_7 nfitsview3_5_screenshot_6 nfitsview3_5_screenshot_5 nfitsview3_5_screenshot_4 nfitsview3_5_screenshot_3 nfitsview3_5_screenshot_2 nfitsview3_5_screenshot_1

About FITS format

The details about FITS format and standards can be found here:

FITS docs

FITS standard