Clipwing

Turn a WebM into an MP4 that plays anywhere

Drop in a WebM and get an MP4 that plays on every phone and site. It all happens in your browser, so nothing gets uploaded

Drop your video here

or click to choose a file. MP4, MOV, WebM, MKV or audio, up to 2 GB

Your file isn’t uploaded

Your browser does all the work, so your video stays on your computer

No quality lost when it can be

If the new format can hold the picture as it is, it is copied, not encoded again

Free, no sign-up

No account, no watermark, no limits. Convert as many files as you need

How it works

  1. 1

    Drop in your file

    A WebM from a screen recorder, a browser or a download, up to 2 GB. It opens right away, because it isn’t uploaded anywhere

  2. 2

    Check it’s MP4

    MP4 is already picked. The VP9 or VP8 picture is encoded as H.264 and the sound as AAC, which every phone, player and site takes

  3. 3

    Convert and download

    Your MP4 plays right on the page, with its size next to the WebM’s. Click Download and it is yours

Free online WebM to MP4 converter

Questions people ask

No. Your browser converts it right on your computer, so nothing is sent anywhere. It works for private and unreleased videos too, and with no wait for an upload.
WebM is made for web pages, so iPhones, QuickTime, PowerPoint and many upload forms won’t take it. An MP4 with H.264 plays everywhere.
WebM holds VP9 or VP8 video, which an MP4 that plays everywhere can’t, so every frame is encoded again as H.264. That takes about as long as the video plays. Keep the tab open until it’s done.
A little, sometimes: H.264 needs a few more bits than VP9 for the same look. It never spends much more than your WebM did, and “Balanced” or “Smallest” makes it smaller.
Yes. Opus or Vorbis sound becomes AAC, which MP4 players expect. Pick “Remove it” under Sound if you want it silent.
MP4, MOV, M4V, WebM, MKV, TS and 3GP videos, and MP3, WAV, M4A, AAC, OGG and FLAC sound, up to 2 GB. AVI and WMV can’t be opened in a browser yet.
Yes. No account, no watermark, and no limit on how many files you convert.

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