ArchLang Playground — write floor plans, compile them in your browser

ArchLang is an open-source (MIT) DSL for floor plans. Write .arch source in the editor below and it compiles in your browser to a dimensioned SVG plan — no install, no account. The same source also compiles to DXF, PDF and PNG from the command line.

Guide · Language reference · One-page spec · 27 example plans · npm · GitHub

The editor compiles in the browser, so it needs JavaScript. Without it, the language is documented in full at archlang.uk/reference, every example plan is published as a static page under /examples/, and the same compiler runs offline from the command line via npm.

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Suggestions:

Attach: Code + Visual attached

Auto Self-Improve (Vision Loop) Ready to chat or generate

🤖 AI Assistant Response

💬 Ask anything about your floor plan (e.g. "What's the issue with the plan?"). The LLM's response will appear here with instant code apply buttons.

Name & Save:

Idle

--:--:-- READY AI Self-Improvement Console active. Generate a plan or click "Improve Current Plan" to begin.

ready

Profile

Brief (intent JSON)

Write the brief down as data, then gate the plan on it — the same contract arch validate --intent and arch score --brief use.

ArchLang Playground — write floor plans, compile them in your browser

SOURCE.ARCH ✨ AI Architect ✨ AI Prompt

ready Preview Describe Lint Intent

ready