TUNEX

Edit ECU firmware in your browser. Hex view with type interpretation, plus structured editing via TunerPro .xdf definitions.

Load a .bin from your disk and either edit raw bytes (with a hex view that shows the byte at the cursor as every numeric type, plus inline hex-pair edit and table-spotting visual modes) or load a TunerPro .xdf definition file and edit the named constants, flags, patches, and tables it describes — apply community patches, toggle features, tweak tables, save the modified binary back to disk.

How to use it

In your browser — tunex.bimmerz.app. Open a firmware file, edit, save. Everything stays on your machine — no upload, no server.

The structured editor reads any TunerPro-format .xdf. The community-maintained MS42 and MS43 patchlists work end-to-end: constants, flags, immobilizer/checksum/M3-LED patches, and 1D/2D tables (including non-contiguous sub-views like the UIF VIN cells).

Chromium-based browsers on desktop (Chrome, Edge, Opera, Brave) — uses the file picker for both the binary and the .xdf, and writes the modified binary back via a download.

Features

• Hex view — virtualised, handles multi-MB firmware without jank. Cursor + keyboard nav, jump-to-offset (g), inline hex-pair editing (double-click → type FF AA CC, Enter commits), contents column switchable to ASCII / u8 / u16 / i16 / u32 / i32 with an optional bars-mode visualisation. Clicking any element in the contents view jumps the cursor to its byte range — a u16 click highlights two bytes, a u32 four.
• "At cursor" panel — every numeric interpretation in one place (paired LE/BE columns), edit-as-type with dec/hex base toggle, auto-populates with the cursor's current value, collapses to a single header when you don't need it.
• Bookmarks — named offsets with descriptions, organised into one level of folders, persisted to local storage.
• Structured editor — categories with item counts on the left, search filter; per-kind editors on the right:
  • Constants — engineering value via MATH equation, write through linear inverse (raw fallback for non-linear), outputtype="3" pre-selects hex display.
  • Flags — checkbox toggling the masked bit.
  • Patches — applied / virgin / mixed state per entry, Apply or Revert at the entry and whole-patch level (the "virginise" flow).
  • Tables — row/column grid with axis labels resolved through <embedinfo> (shared RPM / load axes auto-resolve), inline cell editing, dec/hex toggle, heatmap colouring on by default, and support for non-contiguous sub-views via the stride formula.
• Cross-link — selecting a structured item highlights its byte range in the hex view; "Jump 0x… →" pops the RAW tab open at that address.
• Encrypted XDF detection — .xdf files protected with TunerPro Pro passwords are detected up front and refused cleanly instead of surfacing garbled items.

Links

• GitHub — source, releases, issues.
• Drop-in support for any TunerPro .xdf (MS41, MS42, MS43, ME7, anything else the community has authored).