Why write Markdown when your agent can ship HTML?

What it does

HTML Anything is a local-first editor that treats Markdown as an intermediate draft and HTML as the final deliverable. You feed it notes, spreadsheets, or raw text, pick one of 75 design templates spanning nine output formats — from magazine articles to Xiaohongshu cards to Hyperframes storyboards — and the tool delegates the markup to whichever AI coding agent is already sitting on your PATH. The result is a sandboxed, single-file HTML artifact that can be exported as a high-DPI PNG or posted directly to WeChat, X, or Zhihu.

The interesting bit

The clever part isn’t the templates; it’s the zero-friction plumbing. The app scans for eight different coding-agent CLIs — Claude Code, Cursor, Codex, Gemini, Copilot, OpenCode, Qwen, and Aider — and silently reuses the login session you already have, so there is no API key to paste and no meter to run. It is essentially a design-system wrapper around your existing agent subscription, treating the CLI as a layout engine rather than a chatbot.

Key highlights

• Ships with 75 composable SKILL.md templates, including Swiss International decks, newsprint posters, and Remotion-compatible video frames.
• Runs entirely on your machine and reuses existing agent CLI auth; the README pitches marginal cost as $0.
• Exports are aggressively platform-optimized — CSS is juice-inlined for WeChat and Zhihu paste, and PNG captures are rendered via a high-DPI iframe pipeline.
• Built on the same architecture as nexu-io/open-design, a 40 k-star design-system project, and enforces anti-slop constraints like CJK-first font stacks and an 8 px baseline grid.

Verdict

Developers who already live inside Claude Code or Cursor and need to share readable, designed artifacts — not raw Markdown — will find this a natural extension of their workflow. If you do not have a supported agent CLI installed and logged in, or if you need full manual control over every CSS rule, this editor will feel more like a black-box generator than a design tool.