Short answers to the questions that come up most often. Each links to the page with the full story.
Yes — it is free to use under its licence, and runs on Windows 10 or later (64-bit). See download and installation.
No. Tuning Editor edits calibration files; reading the data out of a vehicle and writing it back is done with your own tool or hardware. See your first calibration.
Intel HEX, Motorola S-record (.s19/.s28/.s37) and raw BIN. See importing binaries.
Work in a collection and duplicate a version before editing, so the stock read is always preserved.
Most often the checksum is stale. Correct it before exporting; see checksums.
Import a definition file (A2L) or apply a map pack to turn raw bytes into named maps.
Make sure the matching passphrase is in your password ring, or set the correct external password. See file security.
They need a signed-in account; some files are free, others cost credits or are covered by a subscription. See online account.
Yes — with checksum, UI/extension and import/export plugins, and you can build your own.
Updates are free; it checks on startup and you can check any time. See updates.
Note — still stuck? The troubleshooting page has more...
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A free, modern Windows software for viewing and editing ECU calibration data - map and hex editors, tuning calculators, and online services.
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