Developer tools — open source · 2025 · Open source
Swap.Htmx — server-driven UI for .NET
An MIT-licensed NuGet library for building HTMX-style server-driven UIs in .NET — v1.7.0, with a documentation site.
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The problem
.NET teams that want modern interactivity are usually pushed toward adopting a JavaScript SPA — a second codebase, a second build system, a second set of bugs — when most line-of-business apps just need the server to swap fragments of the page.
The approach
A library published to NuGet that gives .NET typed, first-class helpers for the HTMX server-driven model: partial swaps, triggers, and responses that stay in C#. Shipped with a documentation site and iterated through public semver releases to v1.7.0.
The outcome
Open source under MIT and used in Apphive's own production client builds — the physiotherapy practice system above runs on the same server-driven approach the library packages up.
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