Spline 3D · WebGL · HTML Export · ZIP Upload
Export Spline
3D Scenes to MP4
Export your Spline scene as HTML, zip it, and upload to Animation Machine. Your 3D animation renders in Chromium — then gets music, captions, and voiceover added.
1 free render · $5/month after · Cancel anytime
How it works
Export from Spline
Export → Web (HTML) → ZIP
→
Upload and render
WebGL in Chromium, frame-by-frame
→
Download MP4
With music, captions, voiceover
Features
Everything you need for Spline to MP4
WebGL rendering in Chromium
Spline scenes run in WebGL. Animation Machine loads your HTML export in a full Chromium instance with WebGL enabled, capturing every frame as your 3D animation plays — exactly as it appears in a browser.
Background music library
Search 500,000 free CC0 tracks by mood (Cinematic, Dramatic, Epic, Ambient, and more) or upload your own. Music loops and trims to your scene's exact animation duration automatically.
AI voiceover + captions
Write a script and Kokoro TTS generates narration locally in 14 voices. Whisper AI transcribes it and burns captions into the output MP4. Great for 3D product explainers and portfolio videos.
Auto-play animations render
Spline animations that play automatically on load — including looping scenes, hover-to-animate configured to auto-advance, and timeline animations — will all render. Interactive click/drag scenes stay in default pose.
FAQ
Spline to MP4 — Common Questions
How do I export a Spline scene for Animation Machine?
In Spline, open your scene and click Export > Web (HTML). Spline generates an HTML file and a build folder containing your scene assets. Zip the entire folder (HTML + build directory together) and upload that ZIP to Animation Machine.
Will my Spline 3D animations render correctly?
Spline exports run in WebGL inside a browser. Animation Machine loads your HTML export in a full Chromium instance — which has WebGL support — and captures frames as the scene animates. Auto-playing animations, loops, and scroll-triggered events will render. Camera controls and interactive hover states require user input, so they will stay in their default position.
Can I add background music to my Spline video?
Yes. Search our 500,000-track CC0 music library by mood or keyword, or upload your own audio. The music is looped and trimmed to match your scene's animation duration.
Can I add AI captions and a voiceover to the video?
Yes. Write a narration script and Kokoro TTS (14 voices) generates it locally. Whisper AI auto-transcribes the voiceover and burns captions into the output MP4. Four caption styles available: Subtle, Bold, Cinematic, Block.
What resolution and format options are available?
Export at 1920×1080, 1280×720, 1080×1920 (portrait), 1080×1080 (square), or 3840×2160 (4K). Output as MP4 (H.264) or animated GIF. Quality presets: Draft, Standard, High, Max.
Can I add a logo or branding overlay to the Spline video?
Yes. Upload a PNG logo, set the corner position (TL/TR/BL/BR), size (5–40% of frame width), and opacity. The logo is composited by FFmpeg directly into the output video.
How much does Animation Machine cost?
Animation Machine is $5 per month with unlimited renders. No per-export fees. Cancel anytime from your account settings.
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