The Lab — ECU File Editor

A practice sandbox. Import a binary, switch between Hex and Map views, and edit bytes as scaled values. Runs entirely in your browser — nothing is uploaded.

Drop or choose an ECU file

Supports .bin, .hex (Intel HEX), .s19/.s28/.s37 (Motorola S-record)

Choose file

Note: .ols (WinOLS projects) and .a2l (ASAM map definitions) aren't parsed in this prototype — those carry map metadata and are the next layer.