Available Runtimes

This page provides information about available Flatpak runtimes. It is primarily intended as information for application developers and distributors.

There are currently three main runtimes available: Freedesktop, GNOME and KDE. These are all hosted on Flathub.

What is mentioned here is just a high level look at the contents. To have up to date information simply install the runtime and open a shell inside of it (flatpak run org.freedesktop.Sdk//18.08) from there you can look around or use tools like pkg-config --list-all. In the runtime shell you can also inspect /usr/manifest.json, which lists the sources used to build it.


The Freedesktop runtime is the standard runtime that can be used for any application and contains a set of essential libraries and services, including D-Bus, GLib, Gtk3, PulseAudio, X11 and Wayland.

Available Freedesktop runtimes:

ID Description
org.freedesktop.Platform Runtime
org.freedesktop.Platform.Locale Runtime translations (extension)
org.freedesktop.Sdk SDK
org.freedesktop.Sdk.Debug SDK debug information (extension)
org.freedesktop.Sdk.Locale SDK translations (extension)
org.freedesktop.Sdk.Docs SDK documentation (extension)


The GNOME runtime is appropriate for any application that uses the GNOME platform. It is based on the Freedesktop runtime and adds the GNOME platform, including:

  • Clutter
  • Gjs
  • GObject Introspection
  • GStreamer
  • GVFS
  • Libnotify
  • Libsecret
  • LibSoup
  • PyGObject
  • Vala
  • WebKitGTK

Available GNOME runtimes:

ID Description
org.gnome.Platform Runtime
org.gnome.Platform.Locale Runtime translations (extension)
org.gnome.Sdk SDK
org.gnome.Sdk.Debug SDK debug information (extension)
org.gnome.Sdk.Locale SDK translations (extension)
org.gnome.Sdk.Docs SDK documentation (extension)


The KDE runtime is also based on the Freedesktop runtime and adds Qt and KDE Frameworks. It is appropriate for any application that makes use of the KDE platform and most Qt-based applications.

Available KDE runtimes:

ID Description
org.kde.Platform Runtime
org.kde.Platform.Locale Runtime translations (extension)
org.kde.Sdk SDK
org.kde.Sdk.Debug SDK debug information (extension)
org.kde.Sdk.Locale SDK translations (extension)
org.kde.Sdk.Docs SDK documentation (extension)