Tenmon – FITS and XISF image viewer, converter and indexer

DOWNLOAD Windows and MacOS Linux it is available as flatpak on flathub.

Now also available in web browser

Discord server

It is intended primarily for viewing astro photos and images. It supports the following formats:

  • FITS 8, 16 bit integer and 32 bit float
  • XISF 8, 16 bit integer and 32 bit float
  • RAW CR2, CR3, DNG, NEF
  • JPEG, PNG, BMP, GIF, PBM, PGM, PPM and SVG images

Features:

  • Using same stretch function as PixInsight
  • OpenGL accelerated drawing
  • Index and search FITS XISF header data
  • Quick mark images and then copy/move marked files
  • Convert FITS <-> XISF
  • Convert FITS/XISF -> JPEG/PNG
  • Image statistics mean, media, min, max
  • Support for WCS
  • Thumbnails
  • Convert CFA images to colour – debayer
  • Color space aware
  • Batch processing with JavaScript
  • Thumbnail generation for FITS/XISF images in Windows File Explorer

You can download source code or pre-build binaries for Windows and MacOS here
On Linux you can install flatpak from flathub.org by running this command
flatpak install flathub space.nouspiro.tenmon