VE Tuner

VE Tuner is a browser-based ECU tuning application for Speeduino and Megasquirt engine control units. It runs entirely in your web browser — no software installation required.

What can VE Tuner do?

• Connect directly to your ECU over USB or serial using the Web Serial API built into Chrome and Edge
• Read and write tuning tables (VE table, ignition advance, AFR targets, and hundreds more) directly on the ECU
• Visualise real-time data with live gauges, a configurable dashboard, and colour-coded heat maps
• Analyse volumetric efficiency by recording a drive log and letting VE Tuner calculate the adjustments your VE table needs
• Load and save tune files in the standard MSQ format, compatible with TunerStudio

Getting started

Choose a topic from the navigation above, or jump straight to Getting Started if this is your first time.

VE Tuner uses the EFI Analytics INI format and is compatible with any ECU that provides a Megasquirt-compatible serial protocol.