Video Converter

Convert video files to WebM format

Click or drop a video file here

About Video Converter

Video Converter re-encodes your video to WebM using the browser's native MediaRecorder API, entirely client-side. Note: WebM is the only output format — there's no selector for MP4, AVI, MOV, or other targets — and since it works by playing and re-recording the video in real time, conversion takes as long as the video's actual duration.

How to use Video Converter

1Click the upload area and select a video file.
2Click "Convert to WebM" — the video plays through once while it's re-recorded.
3Wait for the process to finish (roughly the length of the video).
4Preview and download the resulting WebM file.

Frequently Asked Questions

What formats can I convert to?

WebM only — despite the tool's name, there's no format selector for MP4, AVI, MOV, or other targets.

Is there quality loss?

Yes, some — this re-encodes your video through the browser's WebM encoder, so it isn't a lossless conversion.

How long does conversion take?

Roughly as long as the source video's duration, since it plays and re-records the video in real time.

Is my file uploaded anywhere?

No, conversion runs entirely in your browser using the MediaRecorder API.

Tips & Tricks

✓Keep the browser tab open and active while converting, since the video needs to play through for the recording to work.
✓If you need a format other than WebM, use this to get a WebM file first, then convert that with a dedicated format-specific converter.
✓Test the converted WebM file in your target player before deleting the original, since some older devices have limited WebM support.
✓For long source videos, expect the conversion itself to take about as long as the video runs.