DotNetJS
Interoperability layer for consuming .NET libraries in Node.js
- Status
- Generally available
- Last checked
- Checked · Oct 16, 2026
- License
- Open source
- Pricing
- Free tier · from $0
What it is
DotNetJS is an interoperability layer that allows developers to consume .NET libraries directly within their Node.js applications, enhancing the capabilities of JavaScript with the robustness and performance of .NET.
DotNetJS stands out as a unique solution for developers who need to integrate .NET libraries directly into their Node.js applications, offering a seamless way to combine the strengths of both ecosystems.
When it fits — and when it doesn’t
A good fit for
Developers looking to integrate existing .NET libraries into their Node.js projects without rewriting code
Teams working on cross-platform applications who need to leverage both JavaScript and .NET capabilities
Look elsewhere if
Projects that require real-time, high-performance data processing exclusively in JavaScript
Applications where the overhead of interoperability between two different runtime environments is not acceptable
Known weaknesses
Each one links to the public issue, changelog or docs page it came from, where we have one.
- 01
Complex setup process
Requires configuration of both Node.js and .NET environments, which can be challenging for developers unfamiliar with both ecosystems.
- 02
Limited performance compared to native solutions
Interoperability layer introduces overhead that may result in slower execution times compared to using pure JavaScript or .NET libraries directly.
- 03
Community and support are relatively small
Given its niche use case, the community around DotNetJS is not as large or active as more mainstream tools, leading to fewer resources and slower issue resolution.
What it does well
Enables seamless integration of .NET libraries into Node.js applications
Supports a wide range of .NET libraries and frameworks
Facilitates cross-platform development by combining JavaScript with .NET
Pricing
- Free tier
- YesOpen source — free to use
- Paid from
- $0
- Model
- Flat rate
- Enterprise plan
- No
Pricing not independently confirmed — check the vendor’s page.
Performance benchmarks
How Fast Is It?
Set up DotNetJS
Setup steps, common gotchas and what to check after 30 days.
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