Debug and Trace
Gain Deep Insight into Embedded Software with Powerful Debug and Trace Probes
Industry-leading J-Link and J-Trace Probes
High-speed downloads, unlimited flash breakpoints, and streaming trace
Identify issues quickly, monitor program execution, and optimize the development process
1. J-Link debug probes
2. J-Trace streaming trace probes
3. Supported devices
4. Comparison

Debugging an embedded system - why is it crucial?
Debug and trace probes are essential tools for embedded development, enabling engineers to test, analyze, and optimize code directly on microcontollers and other embedded systems. SEGGER's J-Link and J-Trace models provide high-performance solutions for real-time debugging, breakpoint setting, and comprehensive trace analysis, giving developers deep insight into applications. With these tools, users can identify issues quickly, monitor program execution, and optimize the development process all of which ensures efficient and reliable product performance.
SEGGER's debug and trace probes support a wide range of devices and development environments, making them versatile choices for embedded projects of all types.
J-Link Debug Probes

SEGGER J-Links are an industry leading line of debug probes for embedded systems development. Known for their exceptional speed, reliability, and versatility, J-Links have become the go-to-tools for developers around the world. For over a decade, these probes have been essential in enabling efficient debugging, programming, and performance analysis across a broad range of embedded applications and industries.
J-Link debug probes are the preferred solution for optimizing both the debugging and flash programming experience. Users benefit from record-breaking flash loaders, RAM download speeds of up to 4 MB/s, and the ability to set an unlimited number of breakpoints in microcontroller flash memories. This combination of speed, flexibility and reliability makes SEGGERS's J-Link an essential tool for anyone working in embedded systems from hobbyists and students to professional developers.
J-Trace Streaming Trace Probes

SEGGER's J-Trace is a professional streaming trace probe equipped with an extensive list of features that are tailored to meet the debugging needs of embedded developers and deliver the best possible tracing experience. With capabilities such as unlimited streaming trace, live code profiling, and live code coverage, J-Trace enables developers to effectively isolate and identify hard-to-find code defects.
With multi-platform support for Windows, macOS, and Linux, J-Trace is highy versatile. It is compatible with most popular IDEs, which helps ensure seamless integration into various development environments.
Supported Devices
List of supported manufacturers, families, devices, and SoCs includes tens of thousands of devices in hundreds of device families.
Comparison
| Cortex-A/R Trace | Cortex-M Trace | RISC-V Trace | Ethernet | WiFi | J-Flash | Ozone | Monitor Mode | Flash Breakpoints | RTT | Max. download | Max. target interface speed | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| J-Trace PRO | Supported | Supported | Supported | Supported | Not Supported | Supported | Supported | Supported | Unlimited | Supported | 4.0 MB/s | 50 MHz |
| J-Trace PRO Cortex | Supported | Supported | Not Supported | Supported | Not Supported | Supported | Supported | Supported | Unlimited | Supported | 4.0 MB/s | 50 MHz |
| J-Trace PRO Cortex-M | Not Supported | Supported | Not Supported | Supported | Not Supported | Supported | Supported | Supported | Unlimited | Supported | 4.0 MB/s | 50 MHz |
| J-Trace PRO RISC-V | Not Supported | Not Supported | Supported | Supported | Not Supported | Supported | Supported | Supported | Unlimited | Supported | 4.0 MB/s | 50 MHz |
| J-Link PRO PoE | Not Supported | Not Supported | Not Supported | Supported | Not Supported | Supported | Supported | Supported | Unlimited | Supported | 4.0 MB/s | 50 MHz |
| J-Link PRO | Not Supported | Not Supported | Not Supported | Supported | Not Supported | Supported | Supported | Supported | Unlimited | Supported | 4.0 MB/s | 50 MHz |
| J-Link ULTRA+ | Not Supported | Not Supported | Not Supported | Not Supported | Not Supported | Supported | Supported | Supported | Unlimited | Supported | 4.0 MB/s | 50 MHz |
| J-Link WiFi | Not Supported | Not Supported | Not Supported | Not Supported | Supported | Supported | Supported | Supported | Unlimited | Supported | 1.0 MB/s | 15 MHz |
| J-Link PLUS | Not Supported | Not Supported | Not Supported | Not Supported | Not Supported | Supported | Supported | Supported | Unlimited | Supported | 1.0 MB/s | 15 MHz |
| J-Link BASE | Not Supported | Not Supported | Not Supported | Not Supported | Not Supported | Not Supported | Not Supported | Not Supported | Supported | Supported | 1.0 MB/s | 15 MHz |