Your file.
Your maps.
Your workshop.

MasterX processes compatible files produced by reading tools such as K-TAG, KESS V2/V3, ByteFlasher, CMD Flash, MPPS and PCMFlash. Reading and writing the ECU are performed by your tool; MasterX analyses and modifies the file.

Delivery is digital. For payments made on the website through Stripe, the licence is activated after payment validation and credentials are normally emailed within minutes. For professionals paying by bank transfer, credentials are sent on the day the funds are actually received in the MasterX account. Proof that a transfer was initiated is not receipt of funds. Customers must provide a valid email address and the information needed for invoicing.

Yes. The full supported list is public and dated: more than 2,000 ECUs across more than 110 brands, with Stage 1, Stage 2, IMMO OFF, DTC recognition, FlexFuel and Pops & Bangs shown per ECU. Separate lists dated 18/09/2026 cover Fan Control, Vmax OFF, Start/Stop OFF, Throttle Response and Mappack.

Annual and Monthly include no technical support and no manual processing: no manual file processing, no manual stage, no Restore ORI. Payment, delivery and account-access questions are answered by email on every plan. Annual Plus includes support, unlimited manual file processing and one manually prepared stage file per day; automatic stages are unlimited. Ultimate Plus includes support, unlimited manual files and unlimited manually prepared stages, with processing priority. Restore ORI is manual processing, available from Annual Plus. The checksum module is automatically included in Annual Plus and Ultimate Plus; it is not included in Annual. Files that can be processed are generally handled within minutes: automatically on all licences, or by the team on plans that include manual processing. Support usually answers within minutes on Ultimate Plus, and within hours on Annual Plus under normal conditions. These usual times are indicative. The announced maximum is 48 hours on Annual Plus and 24 hours on Ultimate Plus, measured in calendar hours, 7 days a week, including weekends and public holidays, upon receipt of a complete request and a usable file. For a file-related request, this period covers both processing and the support response; the deadlines are not added together. The time required depends on the file and the work requested. For a technical question without a file, the same maximum reply time applies. Manual processing requests are submitted through Support Solution in the software.

Software updates are included during the licence period. The public catalogue is a dated snapshot: check its generation date and confirm current compatibility by analysing the file in MasterX.

MasterX checks stage compatibility against the loaded file and displays the result. Each module has its own checks; there is no universal 100% threshold. Review compatibility and the reference curves before applying. An incompatible stage is not offered.

MasterX is a Windows application for 64-bit PCs. Use Windows 11 or Windows 10 with the required WebView2 runtime. Compatibility with Windows 8 and 8.1 is not guaranteed.

MasterX is reserved for professionals (tuners, garages and workshops), for use on competition, track and off-road vehicles. The user is solely responsible for compliance with local regulations.

It is an automatic Damos generator built into MasterX. In the Damos tab of MasterX (version 162 and later), you drop your original file and get an A2L built for your ECU, in the language you choose. The export costs 99 tokens (1 token = €1); a library of DAMOS files is also available at 49 tokens per file.