Upscaler, the free open-source AI image upscaling application, released new 1.5.0 version (then v1.5.1 with quick update) in last week.

The new released added sequential image processing support. Meaning user can now open multiple images at once, then let the app enhance them one by one.

Besides choosing multiple images from file chooser dialog (hold Ctrl or Shift to select), user can also drag and drop images into app window to add them into the queue, even during the process of upscaling images.

The release has ported to asyncio and threading Python modules, thus loading images has become much faster and smoother, while using less memory.

Save the resulting images is now completely optional. Under “Completed”, user has the choice to copy image into clipboard, or click save the image as want.

For more about Upscaler, see it in gitlab.gnome.org/World/Upscaler.

Relationship between Upscaler and Upscayl

Both Upscaler and Upscayl are AI image upscaler for offline use. They use the same backend, but target different users.

Upscayl works in Linux, Windows, and macOS. But its UI for Linux does NOT look native, and the Flatpak package has permission access to network, microphone, and audio playback without asking permission.

While Upscaler works only on Linux, and uses GTK4 + LibAdwaita UI toolkits for its modern UI that looks native and well integrate into Ubuntu, Fedora, etc with GNOME Desktop. And, the app package is fully restricted without file, network, etc permission access.

How to Install Upscaler

The app is available to install in most Linux on AMD/Intel platform, through Flatpak package, which runs in sandbox environment.

For Linux Mint 21/22 and Fedora Workstation (with 3rd party repository enabled), simply search for and install the app package either from Software Manager or GNOME Software.

While Debian, Ubuntu, and other Linux may follow the steps below one by one to install it:

• First, press Ctrl+Alt+T on keyboard to open terminal and run command to install Flatpak daemon:

  sudo apt install flatpak

  For other Linux, follow the official setup guide to enable Flatpak support.

  

• Next, run the command below to install Upscaler package:

  flatpak install https://dl.flathub.org/repo/appstream/io.gitlab.theevilskeleton.Upscaler.flatpakref

  NOTE: There may be lots of downloads for run-time libraries (e.g., GNOME platform) that also run in sandbox.

  

After installed the app, either launch from start menu (e.g., GNOME App Grid) or run the command below to start from terminal:

flatpak run io.gitlab.theevilskeleton.Upscaler

For the updates, use command:

flatpak update io.gitlab.theevilskeleton.Upscaler

Uninstall Upscaler

To uninstall the AI image upscaling application, open terminal and run command:

flatpak uninstall --delete-data io.gitlab.theevilskeleton.Upscaler

You may also run flatpak uninstall --unused to remove useless run-times that were installed along with the application.