HTML Animation to Video
Render HTML, CSS, and JavaScript animations into a high-quality H.264 MP4 with a deterministic frame timeline, selector or viewport capture, responsive presets, FPS, duration, background, and quality controls.
- CSS & JavaScript Timeline
- HQ H.264 MP4 Export
- Selector or Viewport
- 12 to 60 FPS
- Windows & Linux FFmpeg
Unpositioned canvases are centered automatically; add data-animation-positioned to preserve an intentional placement.
Advanced rendering
The live preview blocks network resources and plays at browser speed. Create MP4 uses a deterministic server timeline and verified FFmpeg output.
Export an HTML animation to MP4
The verified video will appear here with codec, resolution, duration, FPS, frames, file size, and render time.
Creating the MP4 video
Starting Chromium and FFmpeg…
120 frames will be rendered.MP4 not generated
The preview and download use this same returned MP4 blob. Frames and the temporary server video are removed after the response is created.
What is the HTML Animation to Video tool?
This tool loads sanitized HTML, CSS, and optional JavaScript in an isolated server-side Chromium page, drives CSS animations, Web Animations, requestAnimationFrame, and timers at exact timestamps, and streams every lossless PNG frame directly into FFmpeg.
The editor preview is a quick sandboxed browser guide. The MP4 result is the authoritative server render, and its preview and download use the same returned video blob without a persistent server file.
How to convert a CSS animation to MP4
- Enter the HTML structure, CSS, and optional JavaScript used by the animation.
- Use a fixed-size wrapper such as #animation-stage and choose it as the selector canvas, or capture the complete viewport.
- Choose a landscape, HD, square, vertical, or custom viewport, then set duration and frames per second.
- Select MP4 quality, canvas background, padding, color scheme, and optional public image, style, or font resources.
- Create the video, inspect verified codec, resolution, duration, FPS, frames, and file size, then download the exact MP4.
Why use this CSS animation video renderer?
- Samples CSS and JavaScript animations at exact frame timestamps instead of relying on variable screenshot timing.
- Keeps one fixed selector or viewport crop for every frame to prevent changing video dimensions.
- Pads odd output dimensions when required for broadly compatible H.264 yuv420p playback.
- Streams PNG frames to FFmpeg and removes the temporary MP4 after returning it to the browser.
- Uses the configured Windows or Linux FFmpeg path, with environment and system-path fallback plus FFprobe verification.
HTML Animation to Video FAQ
Does submitted JavaScript run?
Yes. JavaScript entered in the dedicated editor can animate the sanitized page through Web Animations, requestAnimationFrame, and timers. Submitted HTML scripts and event handlers remain stripped, while frames, forms, media, downloads, active connections, and private networks remain blocked.
Why should the selector be a fixed animation canvas?
A moving selector changes position during the animation. Selecting a fixed wrapper keeps every video frame the same size and lets children animate safely inside it.
Which FPS should I choose?
Use 12 or 15 FPS for lightweight graphics, 24 FPS for cinematic motion, 30 FPS for smooth output, or 60 FPS for very fluid animation. Up to 600 frames are allowed, and the resolution-by-frame safety budget still applies.
Will it work on Windows and Linux hosting?
Yes, when config.py points to the documented platform FFmpeg and FFprobe binaries and Playwright Chromium is installed. The service also supports explicit environment overrides and system PATH fallback.
Can MP4 preserve transparency?
No. This tool exports broadly compatible H.264 MP4, so transparent page areas are flattened onto the selected background color.
Help us improve this tool
Please share what we should improve, add, or fix. You can write in the language you are comfortable with. We only save your suggestion and IP address to prevent misuse.