Most AI coding assistants are great at writing code and mediocre at making it look good. Ask one for a presentation deck and you usually get a wall of Markdown, or a pile of files you still have to assemble yourself. HTML Anything takes a different approach: it gives your local AI agent a library of design skills, then lets it produce finished, single-file HTML you can preview safely and ship with one click.
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Key Takeaways
HTML Anything is an open source "agentic HTML editor": your local AI agent writes the HTML, you ship it, with 9,293 GitHub stars and 888 forks as of October 29, 2026, under the Apache-2.0 license.
It ships 75 skill templates across 9 surfaces, including magazines, decks, resumes, posters, Xiaohongshu cards, tweet cards, web prototypes, data reports, and Hyperframes videos.
It needs zero new API keys because it reuses the CLI agent you already use, such as Claude Code, Cursor, Codex, Gemini, Copilot, OpenCode, Qwen, or Aider.
Previews run in a sandboxed iframe, so agent-generated HTML cannot touch your files or network while you review it.
The honest catch is export coverage: WeChat, X, Xiaohongshu, and Zhihu are first-class targets, while LinkedIn, Threads, and Bluesky are not.
The problem: agents write code, not design
AI agents have become good at generating HTML, CSS, and JavaScript on demand. The output, however, is often raw: unstyled pages, inconsistent typography, and layouts that look like a first draft. Designers fix this with taste and iteration, two things a plain prompt rarely supplies.
HTML Anything solves the taste problem with skills. In the Agent Skills model documented by Anthropic, a skill is a SKILL.md file that adds a bundle of instructions to an agent's toolkit. HTML Anything packages 75 of those bundles, each one teaching an agent how to build a specific kind of artifact: a keynote-style deck, a magazine spread, a social card, a data report. The agent does not have to invent the design system from scratch, it follows a template that already knows the spacing, typography, and structure.
The project lives at nexu-io/html-anything on GitHub, where its README states the pitch in one line: "The agentic HTML editor, your local AI agent writes the HTML, you ship it."
What you can build with it
The 9 surfaces cover the artifacts people actually ask agents to make. A deck for a talk, a poster for an event, a resume that looks designed rather than typed, a Xiaohongshu or tweet card for social, a clickable web prototype, a data report with charts, and a Hyperframes video, which is an animated HTML loop such as a phone mockup animation.
Getting started is deliberately boring, in a good way. Install the CLI with `npm install -g @nexu-io/html-anything`, then scaffold a surface with a command like `hta init xhs-card` for a Xiaohongshu card or `hta init hf-iphone-device` for an animated phone frame. Your agent then fills in the content, following the skill's design rules, and you watch the result in a live preview.
That preview is the feature that makes the whole thing trustworthy. Agent-generated HTML can contain scripts, and running unknown scripts on your machine is a bad idea. HTML Anything renders previews inside a sandboxed iframe, so the page can run its animations but cannot reach your files or the network. You review the design first, then export, never the other way around.
Why zero API keys matters
Most AI design tools want another subscription, another key, another account. HTML Anything asks for none of that. It hooks into the CLI agent you already have logged in, whether that is Claude Code, Cursor, Codex, Gemini CLI, Copilot CLI, OpenCode, Qwen, or Aider, and borrows that session. There is no new model bill and no credential to leak, which is exactly why the tool fits a local-first workflow.
The official product page at open-design.ai lists the same deal: 75 skill templates, 9 surface modes, 8 supported coding-agent CLIs, and Apache-2.0 licensing. It is also worth noting that the project comes from the same team behind Open Design, so the design templates are not an afterthought, they are the product.
Export: from preview to published in one click
A design stuck in a preview pane is not shipped work. HTML Anything exports to standalone HTML files, 2x PNG images, and directly to publishing surfaces: WeChat MP articles, X and Weibo posts, Xiaohongshu cards, and Zhihu answers. For creators who publish on those platforms, the loop from prompt to post is genuinely short: prompt, preview, export, publish.
The export list also reveals the tool's current limits. LinkedIn, Threads, and Bluesky are not first-class export targets yet, so if those are your main channels, you will export an image or HTML file and post it manually. The project's own team notes also flag a missing Critique Theater feature, a review mode that existed in its sibling project, so for now the critique step is you, looking at the preview.
Who should use HTML Anything, and who should skip it
HTML Anything fits developers and creators who already work with a CLI agent and often need designed artifacts: decks, social cards, posters, prototypes, and reports. It fits especially well if you publish on WeChat, Xiaohongshu, X, or Zhihu, or if you want polished HTML without handing your content to a cloud design tool.
It is less suited to someone who wants a drag-and-drop editor, or who expects a finished design from a single vague prompt with no review. The tool still needs your eye on the preview, and the skill templates reward specific prompts: tell the agent the audience, the message, and the surface, and it will do far better work than "make something nice."
For a broader look at why the open source model makes tools like this possible, read What Is Open Source? What Open Source Means, in Plain English.
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FAQ
What is HTML Anything?
HTML Anything is an open source agentic HTML editor. It gives your local AI coding agent 75 skill templates across 9 surfaces, so the agent can produce designed HTML artifacts such as decks, posters, social cards, prototypes, and data reports, which you preview in a sandbox and export with one click.
Which AI agents does it work with?
It reuses the CLI agent you already use, including Claude Code, Cursor, Codex, Gemini, Copilot, OpenCode, Qwen, and Aider. It needs no new API key because it borrows your existing logged-in CLI session.
Is HTML Anything free?
Yes. It is open source under the Apache-2.0 license. You can install it, use all 75 skill templates, and export your work without paying, and the code is public on GitHub.
How does the sandboxed preview work?
Previews render inside a sandboxed iframe, so agent-generated HTML can run its animations but cannot access your files or network. You review the design safely before exporting anything.
What can I export to?
You can export standalone HTML files, 2x PNG images, and directly to WeChat MP, X, Weibo, Xiaohongshu, and Zhihu. LinkedIn, Threads, and Bluesky are not first-class export targets yet.
Who makes HTML Anything?
It is built by nexu-io, the same team behind Open Design, and published as an open source project on GitHub, where it had 9,293 stars and 888 forks as of October 29, 2026.