Pascal Editor

Overview

Pascal Editor is a free, browser-based 3D architectural editor that lets you sketch floor plans, model buildings, and share interactive 3D walkthroughs — all without installing any software. Built on WebGPU and React Three Fiber, it delivers browser-native GPU-accelerated rendering in supported browsers on compatible hardware.

Where most 3D architecture tools require expensive licenses and steep learning curves, Pascal Editor takes a different approach: the core building tools are completely free, open source, and designed to be accessible to non-technical users. DIY homeowners can visualize a renovation before the first nail goes in, real estate professionals can produce interactive property walkthroughs in minutes, and interior designers can mock up furniture arrangements during a client meeting without switching apps.

The project is maintained on GitHub under the pascalorg/editor repository and is best described as an open-source browser-based editor for early-stage layout work and room planning. to commercial tools like AutoCAD or Revit for early-stage layout work and room planning.

Key Features

• Smart wall and floor plan tools — Draw building outlines with a grid-aligned wall tool that keeps dimensions precise automatically. Define rooms and zones, place openings, and generate slabs without manual calculations — the editor handles geometry in real time as you sketch.

• Multi-level building support — Design multi-story structures and switch between stacked, exploded, or solo level views to inspect individual floors or see the full building at once. Each level is independently editable while maintaining spatial relationships.

• Drag-and-drop furniture and fixture library — Place doors, windows, furniture, and fixtures from a built-in library. Items snap precisely into walls and rooms, and the 3D view updates instantly as you arrange the space.

• WebGPU-powered real-time rendering — The editor runs on WebGPU, offloading graphics processing to the GPU for smooth, responsive 3D performance even on older hardware, without requiring any local installation or driver setup.

• 50-step undo/redo history — The editor persists scene data to IndexedDB and supports undo/redo with a 50-step history by default. The editor auto-saves to IndexedDB and supports JSON export for portability.

• Shareable interactive walkthroughs — Generate a secure shareable link in one click. Recipients can walk through the 3D model interactively in their browser — no account or software needed to view.

How to Get Started

Pascal Editor runs live at pascaleditor.org — no installation required. Open the editor and start drawing. The free Community Edition saves locally in your browser on a single device, while Pro Cloud adds unlimited cloud projects and sync.

For developers who want to run or modify the codebase locally:

1. Clone the repository

   git clone https://github.com/pascalorg/editor.git
   cd editor
   

2. Install dependencies (requires Bun)

   bun install
   

3. Start the development server

   bun dev
   

   The editor starts at localhost:3000. Run from the root directory to enable hot reload across all packages in the Turborepo monorepo.
4. Begin building — Use the wall tool to trace your floor plan, add levels, place furniture, and generate 3D geometry in real time.

Cloud projects and cross-device sync belong to the paid Pro Cloud plan. The free Community Edition stores projects locally in the browser on a single device.

Pricing & Plans

Pascal Editor is completely free. Pascal Editor offers a free Community Edition and a paid Pro Cloud plan. Community Edition is $0 forever and uses local browser storage on a single device, while Pro Cloud costs $9.90/month and adds unlimited cloud projects, sync, a larger furniture asset library, and high-resolution exports. The full suite of architectural tools — floor plan drafting, 3D modeling, furniture placement, and shareable walkthroughs — is available to all users at no cost.

The project is open source, so developers can self-host, fork, and extend it under the terms of its open-source license.

Community & Ecosystem

Pascal Editor is maintained as an open-source project on GitHub and has gained notable traction in architecture and developer communities. It is part of a broader wave of browser-based AI design tools and open-source alternatives challenging traditional desktop software. As an open-source project, Pascal Editor can be explored, forked, and extended through its GitHub repository and community channels.

The codebase is built with modern web technologies — React 19, Next.js, Three.js, Zustand, and a Turborepo monorepo structure — making it approachable for frontend developers who want to contribute or extend the editor for custom use cases.

Contributions, bug reports, and feature requests are welcome via the GitHub repository. As adoption grows, the community ecosystem around the project is expected to expand with additional furniture libraries, integrations, and workflow plugins.

Best For

• DIY homeowners and renovation planners who want to visualize a space before committing to construction or major purchases
• Real estate agents and property managers who need fast, shareable 3D walkthroughs for listings without professional visualization software
• Interior designers who want to mock up room layouts and furniture arrangements during client consultations
• Architects and students doing early-stage building layout work, roof studies, or site massing without full BIM software
• Developers and technical teams who need a customizable, self-hostable 3D building editor they can fork and extend

FAQ