Convert WebM to MP4
Re-encodes WebM (VP8/VP9 + Opus) into standard, universally-playable H.264/AAC MP4.
Drop a file to convert to MP4
or click to browse
How it works
Drop your .webm file in — usually a screen recording or a download from a site that serves WebM by default.
WavyVid re-encodes the video to H.264 and the audio to AAC, the combination virtually every device and platform supports.
Download the MP4 — it'll play in editors, phones, and platforms that don't handle WebM well.
When you'd use this
- You recorded a screen capture that saved as WebM and your video editor won't import it.
- You downloaded a WebM file and need it in MP4 to play on a device or app that doesn't support WebM well.
- You need a universally compatible format before uploading somewhere that expects standard MP4.
Frequently asked questions
Why doesn't my WebM file play in [editor/device]?
WebM uses VP8/VP9 video and Opus/Vorbis audio codecs, which aren't universally supported the way H.264/AAC MP4 is. Converting fixes this at the source.
Will I lose quality converting WebM to MP4?
There's some quality loss any time you re-encode (this isn't a simple repackaging, since the codecs themselves differ), but WavyVid uses a high-quality, visually-lossless-feeling setting by default.
Does the converted MP4 keep the audio?
Yes, audio is re-encoded to AAC and kept in sync with the video automatically.
Can I then compress the MP4 further?
Yes — run the output through the compress-to-size tool afterward if you need a specific target size.
Why do browser screen recorders default to WebM in the first place?
WebM is natively supported by the browser's own MediaRecorder API without needing a licensed codec, which is why in-browser recording tools tend to output it by default even though MP4 has wider playback support elsewhere.
Want more detail? Read: WebM file won't play? How to convert it to MP4