Download Mantissa
Free, no account required. Cross-platform Windows / macOS / Linux builds are produced from the same Python / Qt source by a single GitHub Actions workflow — all three are published together on every tagged release.
Windows 10 / 11 (x64)
Unzip and double-click Mantissa\Mantissa.exe — no installer.
SHA-256 checksum
Plain-text file alongside the download — open it to see the
expected hash, then verify your local file with
certutil -hashfile (Windows),
shasum -a 256 (macOS), or
sha256sum (Linux).
macOS (Apple Silicon)
Unzip → drag Mantissa.app into /Applications.
SHA-256 checksum
Plain-text file alongside the download — open it to see the
expected hash, then verify your local file with
certutil -hashfile (Windows),
shasum -a 256 (macOS), or
sha256sum (Linux).
Linux (x86_64)
tar -xzf the archive, then ./Mantissa/Mantissa.
SHA-256 checksum
Plain-text file alongside the download — open it to see the
expected hash, then verify your local file with
certutil -hashfile (Windows),
shasum -a 256 (macOS), or
sha256sum (Linux).
What's inside
- Mantissa shell with three modes: Wave Compare, Debugger, Web (landing + tools + tutorials).
- Bundled Python 3.11 runtime, PySide6 (Qt 6), pyqtgraph.
mld-nativebinary for the Wave Compare mode (BS.1387 MLD calculator, built in CI for each platform).- The same tools you've been using in your browser, fully offline.
First-run notes
- Windows SmartScreen may show a warning the first time you run an unsigned download. Click More info → Run anyway. Code-signing is on the roadmap.
- macOS Gatekeeper: the .app isn't notarized yet, so the first launch needs a right-click → Open → Open (Finder remembers the exception thereafter).
- Linux: chmod +x on the extracted binary if your shell doesn't preserve the bit; many GUI extractors do.
- The app stores its preferences in
%APPDATA%\Mantissa\(Windows) or~/.config/mantissa/(macOS / Linux); uninstall is a clean folder delete. - For a full version history (and previous-version downloads), see the release notes on GitHub.