Show HN: Browser-based ECU tuning editor for VAG Simos 18 / DQ250 (theflashbold.github.io)

Got frustrated with WinOLS and TunerPro, so I built my own alternative that runs entirely in the browser.

Techstack: Preact, Typescript, WebGL, Vite, Tailwind

BIN files are parsed entirely client-side, 3D surface maps rendered with WebGL and ECUs are auto-detected via EPK signature.

Built for VAG Simos 18 / DQ250 DSG tuning, but loads standard XDF/A2L definitions too. I use it for my own Audi A3 1.8 IS38 build and customer tunes.