Convert Html5 creative to transparent video (WebM) up to 4k

Convert your HTML5/CSS animations to transparent webm video online. Upload your file, set your options, and get results in minutes. Max upload file size: 200 MB

If your HTML uses external files (JS, CSS, images, fonts, etc.), zip the folder containing the HTML and all its assets and upload the ZIP. If your creative is a single self-contained HTML file, you can upload the HTML file directly.

OR

Enter your HTML creative's http/https url.

Select Advance Options

Select frames per second.

Enter the duration of the creative in seconds. Unpaid members can convert for up to 30 seconds.
Maximum supported duration is up to 300 seconds.

Choose the bitrate value. A range of 17–20 gives good quality with smaller file size. Higher values reduce quality, while lower values improve it.

Select an output dimension (Width x Height). If the item is not on the list, please type it into the input field manually.

Enter the output width between 34 and 3840. The value must be an even number.

Enter the output height between 34 and 3840. The value must be an even number.

Set a short delay (up to 5 seconds) before recording to let the animation load and play smoothly for the best result.

Frequently Asked Questions

It converts your HTML5/CSS animation into a transparent webm video(WEBM).
We render your HTML animation and convert it into a WebM video with transparency (alpha channel). For transparency to work correctly, your animation must have a transparent background.
Before uploading, ensure your design uses a transparent background. html, body { background: transparent !important; }
Make sure all parent elements are transparent, including: html, body, Main containers (div, section, etc.). Even one solid background (like white or black) will break transparency.
Yes, but: Use PNG/WebP with transparency. Avoid JPG (no transparency support). Ensure no background layers are behind them.
A ZIP containing your HTML, CSS, JS, and all assets (images, fonts, libs).
The maximum supported ZIP file size is 200 MB.
Typically 2–3 minutes, depending on the length and dimensions of the animation.
No
Up to 3840×2160 (landscape) or 2160×3840 (portrait).
Yes. You can pick FPS (e.g., 24/30/60) and target quality/bitrate for MP4/WEBM.
Yes—just include all required files in the ZIP and reference them with relative paths.
Embed web-safe formats (WOFF/WOFF2), ensure correct CSS @font-face paths, and include licenses if needed.
Yes—use our API for programmatic HTML5 ➜ MP4/WEBM exports and batch jobs.
Each job has up to 600-second (10 minutes) processing limit. Contact us for more detail/limit.
Yes—outputs are yours, provided you own or have rights to the source assets.