NuEclipse
NuEclipse: A free, open-source IDE for NuMicro 8-bit, Cortex-M, and selected Cortex-A projects. Ranked #17 of 29 in Embedded Development IDEs by our editors (7.5/10); pricing: Free plan; best for nuMicro developers.
At a glance
- Editor score7.5 / 10
- PricingFree plan
- Best forNuMicro developers
- Free planYes
- Paid fromFree
- Integrated debuggingYes
- Founded2008 · Hsinchu, Taiwan
- Facts checked20 Sep 2026
Where it wins
- GNU toolchain integration with GDB-based debugging
- Target-chip erase, flash access, and user-configuration programming
- Windows and Linux 64-bit editions with Nu-Link and OpenOCD support
Where it doesn't
- Focused on Nuvoton NuMicro and selected Cortex-A bare-metal targets
- Requires compatible Nu-Link or OpenOCD-based target access
- Separate editions cover 8-bit SDCC and ARM GCC development
Our verdict on NuEclipse
NuEclipse is Nuvoton’s Eclipse-based integrated development environment for embedded firmware projects. It is designed for engineers working with NuMicro 8051, Cortex-M, and selected Cortex-A bare-metal targets. The IDE supports project creation, building, debugging, target monitoring, flash operations, and programming within a Windows or Linux 64-bit development environment. Its open-source model and free availability make it a practical fit for teams developing firmware around Nuvoton hardware.
The published Free offering includes separate NuEclipse editions for NuMicro 8-bit targets and NuMicro Cortex-M targets. The 8-bit edition uses the SDCC toolchain, while the ARM edition supports GNU ARM Embedded Toolchain integration. Eclipse-based project templates are target-specific, helping organize new projects around supported devices. There are no paid tiers described, so the product’s value is concentrated in its included development and debugging workflow rather than tier-based feature expansion.
Debugging is the standout area. NuEclipse provides GDB support for halt, step, run, and target monitoring, along with hardware breakpoints, watchpoints, memory access, and flash access during debugging. It also supports target-chip erase and user-configuration programming, with Nu-Link hardware and customized OpenOCD integration for target access. The main trade-off is its narrow ecosystem focus: developers outside Nuvoton’s NuMicro and selected Cortex-A bare-metal families should choose a broader embedded IDE. For NuMicro developers who want a free Eclipse and GNU-based workflow on Windows or Linux, NuEclipse is the more natural fit.
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NuEclipse fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Supported targets | NuMicro 8-bit; NuMicro Cortex-M; NuMicro Cortex-A bare metal |
| Integrated debugging | Yes |
| Hardware probe support | Vendor |
| RTOS support | Not verified |
| Integrated flashing | Yes |
| Desktop platforms | Windows; Linux |
| Deployment | Desktop |
| Platforms | Windows, Linux |
| Support | Docs, Community |
| Built for | Solo, Small business, Mid-market, Enterprise (editorial estimate) |
| Pricing | Free plan (source) |
| Website | nuvoton.com |
| Facts checked | 20 Sep 2026 |
Alternatives to NuEclipse
- PlatformIO IDEA free, cross-platform IDE covering build, flash, debug, test, and analysis.9.3
- Arm Keil MDKA broad Arm IDE suite covering coding, debugging, simulation, RTOS, middleware, and CI workflows.9.2
- Code Composer StudioA free, TI-focused IDE with integrated build, debug, configuration, flashing and profiling.9.1
See all NuEclipse alternatives →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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