Convert a local video into another browser-supported container format using MediaRecorder. Available targets depend on MediaRecorder.isTypeSupported() on your device.
When to use it
- Turn a QuickTime or WebM clip into MP4 for legacy players
- Produce WebM for web-first pipelines on Chromium
- Standardize format before another browser tool in the suite
How it works
The tool lists only MIME types your browser can encode. The full timeline is recorded into the selected container without uploading the source.
Example
On Safari, MP4 may appear in the list; on Chrome, WebM (VP9) is typical.
Limitations
- Not a full ffmpeg codec matrix—only MediaRecorder outputs
- Re-encoding always runs; remux-without-transcode is not available
- Unsupported combinations are hidden rather than failing silently server-side