
Theatre
Motion design for the web is supported by Theatre, an editor for creating animations.

About Theatre
Theatre.js is an open-source animation library for motion graphics on the web. It can be used programmatically and with a visual studio editor to animate 3D objects made with THREE.js or other 3D libraries, HTML/SVG via React or other libraries, micro-interactions, generative interactive art, and other JavaScript variables.
The core package is released under the Apache License 2.0, while the studio editor used during design and development is released under the AGPL 3.0 License. Final project bundles include only the core.
Key features
- Animate 3D objects made with THREE.js or other 3D libraries
- Animate HTML and SVG via React or other libraries
- Design micro-interactions
- Choreograph generative interactive art
- Animate other JavaScript variables
- Work programmatically and with visual editing
- Can be used both programmatically and visually
- Works with THREE.js, React, HTML/SVG, and plain JavaScript variables
- Final bundles include only the Apache-licensed core
- Studio editor is licensed under AGPL 3.0, separate from the core
- Public repository development was temporarily moved to a private repo
Theatre at a glance
- Category
- Design & Creative › Video Editing & Animation
- Type
- Open-source project
- Pricing
- Not confirmed. Check the site
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
Guides for Video Editing & Animation
Theatre alternatives
Tools and sites you could use instead, ranked by how closely they match.
FFmpeg Static Auto-Builds provides Windows and Linux builds of FFmpeg, with target platform and runtime requirements listed in its repository.
Av1an provides parallel command-line encoding for AV1, VP9, HEVC, and H.264, with quality targets and VMAF plotting features.
For broken MP4 files, MP4Recover provides a web recovery tool using FFmpeg, MP4Box, and other utilities.
TiXL creates real-time motion graphics, with its repository describing open-source software for motion design.
Avatarify creates photorealistic avatars for video-conferencing apps such as Zoom and Skype, with a desktop edition also linked.
Explore FragM, a project derived from Fragmentarium for creating and viewing graphics.
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Theatre FAQ
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