Direct ECU access over UDS
Read data, run self-tests, execute routines and resets against any ECU on the vehicle — the raw diagnostic layer, exposed cleanly with every identifier, security level and precondition in plain sight.
For independent Tesla workshops
The master control plane for Tesla service.
Master UDSTools doesn't replace Tesla Toolbox 2.1 or 3.0 — it augments them. Direct ECU access over UDS, raw gateway configuration, firmware & map deployment, mileage verification, and the full power of ODIN — in one small binary that runs on almost any computer, with no proxy hassle.
- ✓ macOS & Windows
- ✓ Offline when you want, online with ODIN when you need
- ✓ Unlimited updates included
CANlive bus & UDS
Ethernetdiagnostics
UDSraw ECU routines
DoIPUDS over IP
ODINfull Toolbox 3 tasks
Two generations of Toolbox. One roof.
Toolbox 2.1 was the offline tool everyone loved — raw, direct, no ceremony — but it's deprecated and never covered the modern fleet. Toolbox 3 brought ODIN and current-car support, but it's online-bound, heavily gated and hard to learn. Master UDSTools puts the best of both under one roof: the offline, raw CAN + UDS reach of 2.1, plus the full ODIN power of 3 — in a single tool that stays out of your way.
Tesla Toolbox alone
- Locked to high-level, orchestrated tasks
- Config is heavily gated — you see and change little
- Proxy setup and environment overhead
- Non-intuitive; often needs formal training
- Blocked when a car can't enter Service Mode
With Master UDSTools
- Run UDS commands directly, one layer below the tasks
- Read & write the actual plaintext gateway config
- Single small binary, no proxy, almost any OS
- Power-user layout built for technicians
- Reaches ECUs even when Service Mode is unavailable*
* Useful in the field when a vehicle can't enter Service Mode — for example expired certificates or older firmware — where the standard flow stalls.
Toolbox 2.1
The beloved offline tool. Raw CAN & UDS, direct, no proxy — but deprecated.
Toolbox 3
ODIN and the current fleet — but online-bound, gated and hard to learn.
Master UDSTools
Offline raw CAN + UDS and full ODIN — one truly powerful tool.
Capabilities
One tool. The whole vehicle.
UDS commands straight over CAN
Skip the orchestration. Send diagnostic commands directly over the bus with a plain CAN adapter — curated, searchable and grouped by ECU, with mutating commands always confirmed before they run.
Config backup & restore
Capture an ECU's calibration and configuration before a module swap, then restore it to the replacement part — the clean path for parts replacement and version correction.
Raw gateway configuration
Read and write the actual plaintext vehicle configuration — not the narrow slice the standard tools let you touch. See exactly what's set and change it with intent.
Firmware & map deployment
Reach the update service to stage custom firmware and map versions — local, remote or official — and control staged updates on your terms.
Mileage verification & correction
Cross-check the displayed odometer against independent vehicle totalizers to catch tampering, and correct mileage after a bad battery or inverter swap has thrown it off.
Full ODIN, the power-user way
Every ODIN procedure Toolbox 3 offers, in a fast, searchable, no-nonsense layout. Requires your own valid Toolbox 3 subscription and credentials, which we fully support.
DoIP — UDS over Ethernet
Diagnostics over IP that Tesla does not officially expose — giving you a modern, high-bandwidth path to the vehicle when you need it.
Live signals & health
Decode live CAN into named signals, read battery state of health and equivalent cycles, and browse hundreds of vehicle vitals across powertrain, thermal, body and comms.
Inside the tool
Built for technicians who want the real controls.
Raw UDS command execution
Hundreds of curated commands, grouped by function and searchable by ECU or identifier. Reads, self-tests and resets over the live link — with the security level and preconditions shown for every one.
Mileage integrity, at a glance
Two independent totalizers — energy throughput and drive-unit revolutions — are compared against the displayed odometer. A clear verdict and ratio tell you instantly whether a car has been rolled back.
Config backup & restore for module swaps
Read an ECU's calibration, configuration and identity records before a parts replacement, save them to a file, and restore config to the replacement module — version correction made routine.
Every vital, one search box
Hundreds of decoded vehicle signals across powertrain, thermal, body, cabin and comms — identity, driving state, build options and live alerts, all filterable in one place.
Battery health that's actually measured
State of health, pack energy, equivalent full cycles and lifetime coulomb counters — read straight from the vehicle, not estimated.
Per-ECU trouble codes, read and clear
Scan the vehicle, see active and stored codes per ECU with human-readable descriptions, and clear them where appropriate.
Dark or light — your bench, your call.
The whole interface ships in both themes, so it reads well under any shop lighting.
Reach
Broad platform coverage, four transports.
Meet the vehicle wherever it lives — on the CAN bus, over Ethernet, and via DoIP — across the modern Tesla fleet.
Model S / X
Legacy and current-generation compute, on the bus and over Ethernet.
Model 3 / Y
Full UDS routine execution on current-generation vehicles.
Current-gen compute
Direct UDS access on the newest platform — where comparable tooling is scarce.
Runs almost anywhere
A single small binary for macOS and Windows — no heavy install, no proxy.
See it before you connect
A full demo mode, built in.
Every screen runs on realistic captured vehicle data before you ever plug in — perfect for training, evaluation and off-bench work. The moment a real vehicle appears, demo data is cleared automatically, so what's on screen is always the car in front of you.
- ✓ Model S/X and Model 3/Y demo vehicles
- ✓ Real captured signals, DTCs and vitals
- ✓ Clearly badged so it's never mistaken for a live car
Want a hands-on look? We don't offer a public download yet — talk to us and we'll walk you through a live demo of the whole tool.
Request a demo
Yours to trust
Offline when you want it. Online when you need it.
Best of both worlds, on your terms: everything but ODIN runs completely offline — no account, no cloud, no strings — and when a job calls for ODIN, it goes online through your own Toolbox 3 account. You choose the mode the work needs; what happens on the bench stays on the bench.
Fully offline capable
Everything but ODIN runs with no internet at all — ideal for isolated bays and secure sites.
No phone-home
The app doesn't call home, check in or beacon. What happens on the machine stays on the machine.
Zero analytics
No telemetry, no tracking, no data sent to us or anyone else. Your vehicles and your shop are your business.
Clean & safe
Virus- and malware-free — unlike some of the shady tools floating around the internet. A single, honest binary.
Simple & fair
Licensing that gets out of your way.
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1
Send one request code
It identifies the computer's hardware and nothing else — no account, no phone-home.
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2
Paste the unlock code you get back
Activate in seconds. The code survives app updates, RAM or disk upgrades and OS reinstalls.
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3
Work — online or off
Licensing is fully offline. Moving machines later is a two-click transfer.
Unlimited updates
Every new feature, as it ships — included.
Guided demo
See the whole tool in action before you buy.
No proxy, no dongle lock-in
One small binary on the machines you already run.
Perpetual options
Machine-locked licenses that keep working offline.
Give your workshop the master control plane.
The most powerful Tesla workshop tool you can put on the bench.
Good to know
Frequently asked
Does this replace Tesla Toolbox 2.1 or 3.0?
No — it augments them, and brings both generations under one roof. You get the offline, raw CAN + UDS reach that made the now-deprecated Toolbox 2.1 so well-liked, together with the full ODIN power of Toolbox 3 — plus direct ECU access, gateway configuration, firmware and map deployment, and mileage work that neither exposes. One tool, on the bench, doing all of it.
Do I still need Toolbox 3 credentials?
For ODIN procedures, yes — those require your own valid Toolbox 3 subscription and credentials, which we fully support. Everything else works without them.
What if a vehicle can't enter Service Mode?
That's exactly where this tool earns its place. When the standard flow stalls — for example expired certificates or older firmware — Master UDSTools can still reach ECUs directly for diagnosis and repair work.
What do I need to connect?
A common CAN adapter for bus work, or an Ethernet connection for diagnostics over IP. No Tesla proxy and no vendor-locked dongle. The whole app is a single small binary.
Which operating systems are supported?
macOS and Windows today, from one lightweight download. There's no heavy framework or runtime to install.
How does mileage correction work?
The tool compares the displayed odometer against independent vehicle totalizers to verify integrity, and supports correcting mileage on vehicles thrown off by tampering or by a bad battery or inverter swap.
Does the app send my data anywhere?
No. Apart from ODIN — which talks to Tesla through your own Toolbox 3 account — the app runs completely offline. It doesn't call home, collects no analytics, and sends nothing to us or any third party. It's a clean, virus- and malware-free binary, not one of the shady tools floating around online.
Can I see it before buying?
Yes. The tool has a full demo mode with realistic captured vehicle data, so every screen can be shown without a car connected. We don't offer a public download yet — talk to sales and we'll walk you through a live demo.