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Convert Video
Convert between MP4 and WebM in your browser. No upload, no watermark, no signup — your file stays on your device.
How to convert in your browser
- Drop your video
Loads instantly and stays local.
- Choose a format
MP4 (H.264 + AAC) for compatibility, or WebM (VP9 + Opus).
- Convert
ffmpeg.wasm transcodes locally with a live progress bar.
- Download
Save the converted file.
FAQ
How do I convert MP4 to WebM (or WebM to MP4) for free?
Drop your video into ClipForge, pick the target format and click Process. Conversion runs locally via ffmpeg.wasm — no upload, no account, no watermark.
Why convert to WebM?
WebM (VP9/Opus) is an open, royalty-free format that's often smaller and ideal for the web. MP4 (H.264) is the most universally compatible.
Does it support H.265/AV1?
The default in-browser build doesn't encode H.265 or AV1 (patent/availability reasons), so those options aren't offered. MP4 (H.264) and WebM (VP9) are fully supported.
Is my video private?
Yes — it never leaves your device.