HTML Anything: The Agentic Editor That Turns AI Output into Ship-Ready Assets
Stop settling for raw Markdown. HTML Anything is a local-first, zero-API-key editor that uses your existing AI coding agents to generate production-grade HTML.
In the era of AI-assisted development, we’ve become accustomed to generating content in Markdown. It’s fast, readable, and ubiquitous. But Markdown is an intermediate state—it’s not what your audience actually sees. When you need to ship a deck, a report, a social media card, or a web prototype, you’re often left with a "design gap" that requires manual formatting.
HTML Anything bridges this gap by treating HTML as the final, native output format. It’s an agentic editor designed to turn your raw data—Markdown, CSV, JSON, or SQL—into polished, ship-ready HTML in seconds.
Why Move Beyond Markdown?
The team behind HTML Anything makes a compelling argument: Markdown is for the writer, but HTML is for the reader. By forcing the AI to output structured HTML, you gain:
- Layout Control: No more fighting with renderer-specific limitations.
- Design Consistency: Every output adheres to a strict design system (8px grid, CJK-first font stacks, and high-contrast accessibility).
- Zero-Touch Export: One-click conversion to formats optimized for WeChat, X (Twitter), Zhihu, or high-DPI PNGs.
How It Works: The Agentic Workflow
Unlike web-based AI tools that require you to pay for their proprietary models, HTML Anything is local-first. It detects the coding agents you already have installed on your machine.
When you boot the application, it scans your PATH for CLI tools like Claude Code, Cursor Agent, Codex, Gemini CLI, GitHub Copilot, OpenCode, Qwen, or Aider. It then reuses your existing authenticated sessions. You don't need to manage API keys or pay extra subscription fees.
The Technical Stack
- Frontend: Next.js 16 with React 19 and Tailwind CSS v4.
- Streaming: Uses Server-Sent Events (SSE) to stream the AI's output directly into a sandboxed
<iframe>. You watch the page render in real-time, just like watching a terminal type. - Security: The preview is strictly sandboxed (
sandbox="allow-scripts allow-same-origin"), ensuring that while your custom CSS and scripts run, your local cookies and storage remain isolated.
75+ Skill Templates
The power of the tool lies in its "Skills." Each skill is a folder containing a SKILL.md file that defines the constraints and design system for a specific output type. Whether you need a Swiss-style deck, a brutalist web prototype, or a high-end magazine poster, the agent follows strict rules:
- No Lorem Ipsum: It forces the use of your real data.
- Design Discipline: Every element must respect the 8px baseline grid.
- Accessibility: Contrast ratios are enforced at ≥ 4.5.
Quickstart Guide
Getting started is straightforward. Clone the repo and launch the development environment:
git clone https://github.com/nexu-io/html-anything
cd html-anything
pnpm install
pnpm -F @html-anything/next dev
Once running at http://localhost:3000, the top bar will auto-detect your installed CLI agents. Simply select a template, paste your content, and hit ⌘+Enter.
Why This Matters for Developers
For developers, this project represents a shift in how we think about "vibe coding." Instead of just generating code snippets, we are generating artifacts. By leveraging the existing CLI tools we use for coding, HTML Anything turns the entire browser into a canvas for high-fidelity, data-driven communication.
If you are tired of the "I'll touch it up later" phase of content creation, this project is the missing piece in your workflow.