Download Specifica 1.2.1 for Windows and Linux, free

Installing on Windows

1. Unblock the archive

   Windows marks files downloaded from the internet, and the unpacked program may not work properly. Right-click the archive → «Properties» → at the bottom of the «General» tab tick «Unblock» → «OK». Unpack it after that.

2. Unpack the archive

   No administrator rights are needed if you can write to the folder, for example %LOCALAPPDATA%\Programs\Specifica. The program does not touch the registry and keeps all its files in its own folder.

3. Install the .NET Runtime — for the «Without .NET» build

   The base .NET Runtime 10 (Microsoft.NETCore.App) is required; the ASP.NET Core Runtime and the .NET Desktop Runtime are not needed for this program. To list installed runtimes: dotnet --list-runtimes.

   winget install Microsoft.DotNet.Runtime.10

   Or use the «.NET Runtime 10.0.x, Windows x64» installer from dotnet.microsoft.com . Installing the runtime needs administrator rights and is done once.

4. Run Specifica.exe

   On the first run Windows may show a blue «Windows protected your PC» window. SmartScreen shows this warning for programs that are not signed with a publisher certificate and have not yet built up download statistics; it does not mean the program contains malicious code. Click «More info» → «Run anyway».

   To check that the file is genuine, compare its checksum with the one published above:

   certutil -hashfile specifica-1.2.1-win-x64-standalone.zip SHA256

Installing on Linux

1. Check the system libraries

   Most distributions already have them. The DejaVu or Liberation fonts are needed for PDF export: without them the export fails with a message saying so.

   sudo apt install libicu74 libx11-6 libice6 libsm6 libfontconfig1 fonts-dejavu-core

   For Fedora, RED OS and RHEL:

   sudo dnf install libicu libX11 libICE libSM fontconfig dejavu-sans-fonts

2. Install the .NET Runtime — for the «Without .NET» build

   The base .NET Runtime 10 is required; to check: dotnet --list-runtimes.

   sudo apt install dotnet-runtime-10.0

   If your distribution has no such package — including Astra Linux, RED OS and ALT:

   curl -sSL https://dot.net/v1/dotnet-install.sh -o dotnet-install.sh
   sh dotnet-install.sh --channel 10.0 --runtime dotnet
   export PATH="$HOME/.dotnet:$PATH"

3. Unpack the archive

   tar -xzf specifica-1.2.1-linux-x64-standalone.tar.gz
   cd specifica-1.2.1

   To verify the checksum: sha256sum specifica-1.2.1-linux-x64-standalone.tar.gz

4. Run without installing

   ./Specifica

   Nothing in the system is changed; this is fine for a first look.

5. Install for everyday use

   The script installs the program into your home folder, no administrator rights needed:

   sh ./install.sh

   It creates an icon, an application menu entry and a launch command:

   specifica

   If the shell answers command not found, ~/.local/bin is not in your PATH: add export PATH="$HOME/.local/bin:$PATH" to ~/.profile and log in again. To install for all users: sudo PREFIX=/usr/local sh ./install.sh.

If it does not start

«To run this application, you must install .NET»

The runtime is not installed or has the wrong bitness — or take the build with bundled .NET.

Windows: the program misbehaves right after unpacking

Most likely the archive was not unblocked. Delete the folder, unblock the archive and unpack it again.

Linux: «Permission denied»

chmod +x ./Specifica

Linux: «error while loading shared libraries»

A library from the first step is missing; its name is in the message itself.

Linux: «Couldn't find a valid ICU package»

libicu is not installed.

Linux: the window does not appear in a Wayland session

GDK_BACKEND=x11 ./Specifica

The log always helps: %APPDATA%\Specifica\logs on Windows, ~/.config/Specifica/logs on Linux. Contact support and attach it to your request.