Convert MP4 to WebM
Convert MP4 to WebM online for free. Simply drop your MP4 files below to convert them to WebM in seconds.
- Free Converter
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- No Uploads
Add files
Drop files anywhere on the page or paste them with Ctrl+V / ⌘+V
How to convert MP4 to WebM?
Add MP4 files
Drag and drop files onto the page or click the upload area. You can add several files at once.
Choose WebM and settings
Pick the target format and, if needed, adjust quality, size and other options.
Download the result
Conversion runs right in your browser. Download files one by one or all at once as a ZIP archive.
Converting MP4 to WebM: what to know
MP4 is converted to WebM for websites and web apps: WebM is an open format that browsers play in the video tag without extra codecs or licenses.
Video in WebM is always re-encoded: the H.264 codec from MP4 isn't allowed in WebM. Encoding runs right in your browser, so long videos take longer. In the settings you can choose the codec, resolution and bitrate to balance size and quality.
MP4 or WebM: which to choose?
MP4 (MPEG-4 Part 14)
MP4 is the most compatible video format: it plays on phones, TVs, browsers and social networks.
Best for publishing and sending videos - maximum compatibility at a reasonable size.
WebM
WebM is an open video format from Google for the web, with VP8, VP9 or AV1 video.
Best for video on websites and screen recordings.
What happens when converting MP4 to WebM
If the codecs inside MP4 are supported by WebM, the tracks are copied without re-encoding - quickly and without quality loss. Otherwise the video is re-encoded with the codec, bitrate, resolution and frame rate you choose.
You can also trim the video, rotate or flip it and remove the sound.
MP4 files up to 2 GB are supported; the actual limit also depends on the free memory of your device.
MP4 and WebM compared
Convert MP4 to other formats
Convert other formats to WebM
What else you can do with MP4
Frequently asked questions
How do I convert MP4 to WebM?
Add MP4 files above - WebM is already selected as the target format. Adjust the settings if needed, start the conversion and download the WebM files.
Can I change the WebM quality?
Yes. Set the quality from 1 to 100 in the file settings: the lower the value, the smaller the file.