Modern, open-source ECU tuning software for EpicEFI, Speeduino, rusEFI, and other TS format INI compatible aftermarket engine control units.
Please note that this project is still very early days - these notes are largely agentically written, and may not be 100% accurate at this time. We welcome public contribution, and want this to be a thriving publically developed effort.
- Cross-platform: Runs on Windows, macOS, and Linux
- Modern Architecture: Rust core with native desktop UI via Tauri
- INI Definition Compatible: Works with standard ECU INI definition files
- Real-time Data: Live sensor display with configurable dashboard gauges
- 2D/3D Table Editors: Full-featured grid editor with keyboard navigation
- Editing Tools: Set Equal, Increase/Decrease, Scale, Interpolate, Smooth
- Re-binning: Change axis bins with automatic Z-value interpolation
- Copy/Paste: Standard clipboard operations for table data
- Burn to ECU: Write changes directly to ECU memory
- TS-Compatible Dashboards: Import existing .dash files
- Multiple Gauge Types: Analog dials, bar gauges, digital readouts, sweep gauges
- Customizable Layout: Drag-and-drop gauge positioning
- Designer Mode: Edit dashboard layouts visually
- Live Auto-tuning: Real-time fuel table recommendations based on AFR targets
- Heat Maps: Visualize cell weighting and change magnitude
- Cell Locking: Lock cells to prevent AutoTune modifications
- Authority Limits: Configure maximum adjustment percentages
- Project-based Workflow: Organize tunes by vehicle/ECU
- INI Repository: Manage ECU definition files with signature matching
- Online INI Search: Download INI files from Speeduino and rusEFI GitHub repos
- Signature Mismatch Detection: Automatic detection when ECU doesn't match INI
| Welcome Screen | Settings Dialog | Table Editor |
|---|---|---|
 |
 |
|
- Speeduino - Full support for INI definition files
- rusEFI - Full support for INI definition files
- Megasquirt MS1/MS2
- Megasquirt MS3
- Other INI-compatible ECUs
- Rust 1.75+ - Install via rustup
- Node.js 18+ - For the Tauri frontend
# Clone the repository
git clone https://github.com/RallyPat/LibreTune.git
cd LibreTune
# Install frontend dependencies
cd crates/libretune-app
npm install
# Run in development mode
npm run tauri dev# If you are getting a message about link.exe not being found
# you may need to download the Visual Stuido Build Tools
# until the binaries are ready to be distributed.
# 1. Install Visual Studio Build Tools
# Download from:
# https://visualstudio.microsoft.com/downloads/
#
# Scroll to "Tools for Visual Studio" → "Build Tools for Visual Studio".
# During installation, enable ONLY this workload:
#
# ✔ Desktop development with C++
#
# This installs:
# - MSVC compiler
# - link.exe
# - Windows 10/11 SDK
# - CMake and Ninja
# 2. Ensure Rust is using the MSVC toolchain
rustup default stable-x86_64-pc-windows-msvc
# 3. Restart your terminal so PATH updates
# 4. Build LibreTune (development mode)
cd crates/libretune-app
npm install
npm run tauri devcd crates/libretune-app
npm run tauri buildlibretune/
├── crates/
│ ├── libretune-core/ # Core Rust library
│ │ ├── src/
│ │ │ ├── ini/ # INI file parsing
│ │ │ ├── protocol/ # Serial communication
│ │ │ ├── ecu/ # ECU memory model
│ │ │ ├── datalog/ # Data logging
│ │ │ ├── autotune/ # AutoTune algorithms
│ │ │ └── tune/ # Tune file management
│ │ └── Cargo.toml
│ └── libretune-app/ # Tauri desktop application
│ ├── src/ # React frontend (TypeScript)
│ └── src-tauri/ # Tauri backend (Rust)
├── docs/ # Documentation and screenshots
└── Cargo.toml # Workspace root
See CONTRIBUTING.md for development setup and guidelines.
cargo test --workspacecargo clippy --workspaceThis program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License version 2 as published by the Free Software Foundation.
See LICENSE for the full license text.
Contributions are welcome! Please read CONTRIBUTING.md before submitting PRs.
LibreTune is an independent open-source project and is not affiliated with EFI Analytics.
