fused-render

Download for macOS, Windows, and Linux →

Your files, your AI, your apps — on your own machine. Browse any directory in the browser, run AI models locally, and describe an app for Claude Code to build. Any .html file you open gets a tiny injected runtime that can call a Python main() function and sync its state to the URL.

Runs entirely on 127.0.0.1. No accounts, no cloud, no sandboxing — your own machine, your own trusted code.

Download

Download from render.fused.io:

• macOS — .dmg, Apple silicon
• Windows — 64-bit .exe installer
• Linux — AppImage

macOS is the native build; Windows and Linux have limited support. Trouble on first run? See troubleshooting.

Other ways in

Homebrew — the same macOS app, from the tap:

brew install --cask fusedio/tap/fused-render

GitHub releases — every build the download page serves is also attached to its release, if you want an older version or a checksum.

Python package — for running fused-render inside a Python environment you already have, rather than as a desktop app. Each release attaches a wheel (see the release notes for its URL): pip install <wheel-url>. From a source checkout:

pip install -e .

Requires Python 3.11+. Building from source and the local dev loop live in CONTRIBUTING.md.

What's in it

Home opens on a file search, with everything on this machine below it:

• Apps — describe one in a sentence; Claude Code names it, scaffolds it, and opens a chat on it. Community apps from the showcase are yours to open and edit in place.
• AI models — image, video (Apple silicon), speech-to-text and embeddings run locally, from the Playground or from your own pages. The AI Models page shows what's on disk and what fits this machine.
• Claude Code, without the terminal — every Claude session on this machine in one place, and Tasks: prompts that run on a schedule.
• Files — comes with apps for opening Parquet, PDF, notebook, spreadsheet, point clouds, and more. Remote storage mounts as folders.

Run

The downloaded app opens Home in a browser tab. From a pip install it's a command:

fused-render

Either way you land on http://127.0.0.1:1777/. Useful flags:

fused-render --start-dir ~/data --port 9000 --no-browser

--start-dir is where the explorer starts (default ~/Fused); the whole filesystem stays browsable from there.

Windows: Explorer "Open with"

fused-render-open --register

Registers fused-render into Explorer's right-click "Open with" menu (HKCU only, no admin) for every format it previews — double-clicking a file, or picking "fused-render" from Open With, reuses a running server or starts one detached, then opens the file. fused-render-open --unregister removes the associations.

Authoring

Any .py file is a runnable target as long as it defines a main() function:

# sine.py
import math

def main(n: int = 80, freq: float = 1.0):
    return {"points": [[i / n, math.sin(2 * math.pi * freq * i / n)] for i in range(n)]}

Any .html file can call it and bind the result to the URL:

<input id="freq" type="range" min="0.1" max="5" step="0.1" />
<script>
  const slider = document.getElementById("freq");
  slider.addEventListener("input", () => fused.params.set("freq", slider.value));
  fused.params.onChange(draw);

  async function draw() {
    const freq = fused.params.get("freq") || "1.0";
    const { points } = await fused.runPython("./sine.py", { freq });
    // ...render points...
  }
  draw();
</script>

A page can do a lot through fused:

• fused.runPython(pyPath, params) and fused.params — call main(**params) and keep a string key/value store in sync with the URL, so a refresh or a bookmark reproduces the view. fused.readFile / writeFile / uploadFile / mkdir / stat / rawUrl work on files directly, no Python needed. → fused-render-authoring
• fused.ai.text({prompt, ...}) — ask Claude Code, or a local model when opts.model is a Hugging Face repo id (or pin the tier with opts.provider: "local" | "claude"). fused.ai.image / .video / .transcribe / .embed run locally; fused.ai.models lists, downloads, loads and unloads them. → fused-render-ai
• fused.capture — record the screen or the microphone, or grab a screenshot. → fused-render-capture
• fused.fileIndex — search and query the machine-wide file index instead of walking the filesystem. → fused-render-index
• fused.daemon — start, stop and talk to a folder's background daemon, one the server keeps running after the page closes. → fused-render-background-apps
• fused.trackJob / fused.watchJob — long-running work in the download manager, whether your page is doing it or the server is. → fused-render-jobs

fused.env says whether a page is running here ("local") or exported and hosted ("hosted"). The complete list, with every option, is the header of fused_render/static/runtime.js.

Every built-in preview template is an HTML file on these same primitives — fused_render/templates/ has 140 of them to copy from.

Configuration

docs/usage.md covers the execution engine, remote storage mounts, the AI Models page, preferences, and export for hosted serving.

Claude Code plugin

This repo doubles as a Claude Code plugin marketplace. Its skills teach Claude to run the app, author views, use local AI and jobs, and build preview templates — the same skills under skills/.

From inside Claude Code:

/plugin marketplace add fusedio/fused-render
/plugin install fused-render@fused-render

Or from the command line:

claude plugin marketplace add fusedio/fused-render
claude plugin install fused-render@fused-render

The manifests live in .claude-plugin/ (marketplace.json + plugin.json).

Installing is optional and only affects your own Claude Code sessions. Chats started from inside fused-render already get these skills: the app assembles the same plugin under ~/.fused-render/skill-plugin/ and loads it per session with --plugin-dir, so they work on a plain DMG or wheel install with nothing cloned.

Security

SECURITY.md has the trust model and how to report a vulnerability.

License

Open source under the MIT license, made by Fused.