Frontend Frameworks

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.

  1. 01

    Complex setup process

    Requires configuration of both Node.js and .NET environments, which can be challenging for developers unfamiliar with both ecosystems.

  2. 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.

  3. 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.

Open the setup guide →
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