Professional Automotive Diagnostics

Diagnose any ECU.
All protocols. One tool.

Advanced ECU diagnostics, session management and firmware analysis for automotive professionals.

Open App Explore Features
200+
ECU Types
15+
Protocols
99.9%
Uptime
Capabilities

Everything you need
in one platform

From live OBD data to ECU firmware — DiagExt covers the full diagnostic workflow.

J2534 Multi-Adapter

Universal J2534 PassThru support — connect any compatible adapter from any vendor.

OBD / UDS / KWP2000

Full multi-protocol coverage: read and clear DTCs, live data, freeze frames, adaptations.

ECU Programming

Read, analyse and patch ECU firmware with built-in checksum and integrity tools.

Session Scheduling

Plan diagnostic sessions, assign technicians, track job status in real time.

Vehicle Database

Extensive database of makes, models and ECU types — always up to date.

Team Access

Multi-technician workspace with roles, permissions and full audit trail.

Workflow

Simple from day one

Connect, diagnose, report — in minutes, not hours.

Connect your adapter

Plug in any J2534-compatible adapter. DiagExt detects it automatically via the included Windows client.

Select vehicle & protocol

Choose the vehicle from the database or configure manually. Select OBD, UDS, KWP2000 or raw CAN.

Diagnose & act

Read live data, clear faults, read/write firmware, generate reports — all from a clean browser interface.

Ready to get started?

Open the web app directly — no installation required on the server side.

Launch DiagExt →