HTML Video — Programmatic Video Rendering from HTML and CSS

Introduction

HTML Video lets developers create production-quality videos programmatically using HTML, CSS, and JavaScript. Instead of learning video editing software, you write web pages and the tool renders them frame-by-frame into MP4 files, making video generation as scriptable as web development.

What HTML Video Does

• Renders HTML and CSS into MP4 video files frame by frame
• Provides 21 built-in templates for common video formats (intros, demos, social)
• Supports dynamic data binding for personalized video generation at scale
• Includes GSAP animation support for smooth transitions and effects
• Generates AI-powered soundtracks that match the video content

Architecture Overview

HTML Video uses a headless browser (Puppeteer) to render each frame of an HTML page at a configured framerate. Frames are piped to FFmpeg for encoding into the final MP4. The template system uses standard web technologies, so any CSS animation, SVG, or Canvas element can appear in the output video.

Self-Hosting & Configuration

• Install via npm with FFmpeg available on the system PATH
• Configure resolution, framerate, and duration in a video.config.json file
• Use environment variables for API keys if using AI soundtrack features
• Batch render multiple videos by passing a data array
• Docker image available for consistent cross-platform rendering

Key Features

• Uses standard web technologies developers already know
• 21 production-ready templates for immediate use
• Data-driven rendering enables personalized video at scale
• Pluggable render engines (Puppeteer, Playwright, custom)
• Apache 2.0 license with no per-render fees

Comparison with Similar Tools

• Remotion — React-specific vs standard HTML/CSS with any framework
• FFmpeg — low-level encoding vs high-level HTML-to-video workflow
• Lottie — vector animation only vs full HTML/CSS/Canvas rendering
• Hyperframes — similar concept with different template ecosystem
• MoviePy — Python video editing vs web-native programmatic approach

FAQ

Q: What video formats are supported? A: MP4 (H.264) is the primary output. WebM and GIF are also supported via FFmpeg configuration.

Q: Can I use React or Vue in templates? A: Yes. Any framework that renders to HTML in a browser works, since the tool captures rendered frames.

Q: How long does rendering take? A: A 30-second 1080p video typically renders in 1-3 minutes depending on complexity and hardware.

Q: Is there a cloud rendering option? A: The tool is designed for local and self-hosted rendering. Cloud deployment works with any Docker-compatible platform.

Sources

• https://github.com/nexu-io/html-video
• https://github.com/nexu-io/html-video#readme