OpenToonz — Professional 2D Animation Studio Used by Studio Ghibli

Introduction

OpenToonz is a free, open-source 2D animation suite derived from the commercial Toonz software that Studio Ghibli used to produce films like Spirited Away and Princess Mononoke. DWANGO open-sourced it in 2016 and continues to maintain it alongside community contributors.

What OpenToonz Does

• Provides a full traditional animation pipeline from pencil test to final composite
• Supports bitmap and vector drawing with pressure-sensitive pen input
• Handles scanning and cleanup of hand-drawn frames on paper
• Offers a node-based effects compositor for lighting, particles, and distortion
• Includes a timeline and X-sheet (exposure sheet) for professional frame management

Architecture Overview

OpenToonz is written in C++ with a Qt-based UI. The rendering pipeline processes raster and vector levels through a scene graph, applying effects via a node compositor. The X-sheet drives frame exposure and timing. Plugin support through a C SDK allows extending the effects library, and GTS (a proprietary Ghibli scanning module) has been partially open-sourced as well.

Self-Hosting & Configuration

• Download pre-built installers for Windows, macOS, and Linux
• Linux users can also install from distribution repositories or compile from source
• Set up a project folder structure with scenes, levels, and output directories
• Configure tablet input and pressure curves in Preferences
• Customize the workspace layout and keyboard shortcuts to match your workflow

Key Features

• Battle-tested in professional anime production at Studio Ghibli
• Combined raster and vector drawing engine for flexible art styles
• Node-based compositor with dozens of built-in effects
• Traditional X-sheet and timeline views for frame-by-frame control
• Plugin SDK for extending effects and tool capabilities

Comparison with Similar Tools

• Toon Boom Harmony — industry-standard commercial tool; OpenToonz is free with many comparable features
• Synfig Studio — vector-focused 2D animation; OpenToonz supports both bitmap and vector workflows
• Krita — excellent painting tool with animation support, but lacks OpenToonz's compositing pipeline
• Pencil2D — simpler open-source option for beginners; OpenToonz targets production use

FAQ

Q: Is OpenToonz really used by professional studios? A: Yes. Studio Ghibli used the original Toonz for decades. The open-source version retains most of those capabilities.

Q: Can I use a drawing tablet with OpenToonz? A: Yes. It supports Wacom and other pressure-sensitive tablets natively.

Q: Does OpenToonz support audio sync? A: Yes. You can import audio tracks and scrub through them on the timeline for lip-sync work.

Q: What file formats does it export? A: Individual frames as PNG/TGA/TIF, or rendered sequences. Video export is available via FFmpeg integration.

Sources

• https://github.com/opentoonz/opentoonz
• https://opentoonz.github.io