Download Formidable
Formidable is free and open source under the MIT license. Every release is built and published from the GitHub release workflow — what you download is exactly what you can audit on the source tree.
Windows (amd64)
| File | Description |
|---|---|
Formidable-windows-amd64-installer.exe | NSIS installer with WebView2 bootstrap. Installs to Program Files\Formidable, creates Start Menu and Desktop shortcuts. |
Formidable-windows-amd64.zip | Portable executable. Unzip anywhere; no installation required. |
Free code signing for Windows installers is provided by SignPath.io, certificate by the SignPath Foundation.
macOS (universal — Intel + Apple Silicon)
| File | Description |
|---|---|
Formidable-macos-universal.dmg | Universal .app bundle. Drag to Applications. |
The bundle is ad-hoc signed only (not Developer ID notarized), so Gatekeeper will block the first launch. Right-click Formidable.app → Open, or strip the quarantine attribute once:
xattr -d com.apple.quarantine /Applications/Formidable.app
Linux — Debian and Ubuntu
| File | Description |
|---|---|
Formidable-linux-amd64.deb | Debian package, amd64. |
Formidable-linux-arm64.deb | Debian package, arm64 — Raspberry Pi 4/5, ARM Chromebooks. |
Formidable-linux-amd64.tar.gz | Portable amd64 build. |
Formidable-linux-arm64.tar.gz | Portable arm64 build. |
sudo apt install ./Formidable-linux-amd64.deb
Runtime dependencies (libgtk-3-0, libwebkit2gtk-4.1-0, libayatana-appindicator3-1) are pulled in automatically by the .deb.
Linux — Fedora and RHEL
| File | Description |
|---|---|
Formidable-linux-amd64.rpm | RPM package built against Fedora 43. |
sudo dnf install ./Formidable-linux-amd64.rpm
Build from source
If you’d rather not trust the prebuilt artifacts:
git clone https://github.com/petervdpas/Formidable2.git
cd Formidable2
# requires Go 1.25+, Node 20+, and the Wails 3 CLI
wails3 task dev
Verifying
Each release page on GitHub includes auto-generated notes that link back to the source commit. Cross-reference the asset filenames against the release workflow to verify that artifacts were produced by GitHub Actions, not uploaded manually.