Many editors, phones, and upload forms reject WebM.
Video Converter
WebM to MP4
Convert a WebM recording or download into an MP4 that opens on iPhone, in video editors, and on social sites. The video is re-encoded to H.264 on your device.
Nothing uploads, which matters for screen recordings that show your desktop.
- Nothing is uploaded
- Instant when the streams fit
- Files up to 500 MB
- Add a file
- Pick a format
- Save
Drop a WebM file
MP4 · MOV · MKV · WebM · AVI · MP3 · M4A · WAV · up to 500 MB
Free, no signup. Converted on your device.
Why it helps
Why convert WebM to MP4
H.264 MP4 plays on practically everything.
Screen recordings stay on your device the whole time.
How to use it
How to convert WebM to MP4
1 Drop the .webm file in. MP4 is already picked.
2 Press Convert. Every frame is re-encoded, so it takes a while for long videos.
3 Save the .mp4.
Quick tips
WebM to MP4 tips
Re-encoding can take as long as the video plays on a laptop, and longer on a phone.
Trim long recordings first so there is less to re-encode.
Only need the sound? WebM to MP3 finishes in seconds.
FAQ
WebM to MP4 questions
Why does WebM to MP4 take longer than other conversions?
WebM uses VP8 or VP9 video, which MP4 players expect as H.264, so every frame has to be encoded again. It all happens on your device.
Will the quality drop?
Barely. It encodes at a high quality setting, so the MP4 looks the same to the eye.
Open the main Video Converter page
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