⚡
The Fastest JSX Runtime
No virtual DOM means no object tree sitting in memory. Rendering a 170 KiB page runs 2-3x faster than React, Preact, and HonoJsx, while allocating half the memory, all producing identical output.
Kita Html
The fastest server-side JSX runtime
JSX that compiles to plain strings, not a virtual DOM. No diffing, no serialization, no overhead.
index.tsx - /dev/example
index.tsx×
output.html×
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fs.writeFileSync(
'output.html',
<p>
Hello, <b safe>{user.name}</b>!
</p>
);
🛡️
Compile-Time XSS Detection
The TypeScript plugin flags unsafe string interpolations in your editor as you type. The xss-scan CLI blocks them in CI. Vulnerabilities caught before they reach production, with no runtime penalty on safe paths.
🔄
Async and Streaming
Async children automatically make their parents async. Suspense streams HTML via chunked transfer encoding, sending a fallback instantly and replacing it when the promise resolves.
📦
Zero Dependencies
The runtime ships with no dependencies. Small, predictable footprint for serverless functions, edge runtimes, and any environment where cold-start latency matters.
🎯
Type Safe
Complete JSX type definitions for every HTML5 element and attribute. HTMX, Alpine.js, and Hotwire Turbo type extensions are included and opt-in via triple-slash directives.
🔌
Framework Agnostic
The output is a plain string. Kita Html integrates with Fastify, Express, Hono, Bun, or any server that returns strings. If it works with strings, it works with Kita Html.