WEBM → MP4
WebM to MP4
WebM is efficient for the web, but it does not always play on phones, TVs and social networks. MP4 with H.264 and AAC is the most compatible format for sharing and editing.
The file will be deleted from the server automatically.
How to convert WEBM to MP4
- 1Upload a WebM video
- 2Wait for the conversion to MP4
- 3Download the MP4 and open it on any device
More about WEBM to MP4
Why convert WebM to MP4
WebM is a good format for websites, but its support on mobile devices and TVs is uneven. If a video does not play on an iPhone, Android tablet or social network, converting it to MP4 usually solves the problem.
How it works
The file is uploaded to the server and processed by ffmpeg in an isolated queue. Video is encoded to H.264, audio to AAC, and the MP4 gets the faststart flag for quick playback. Progress is shown on the page, and the result is deleted automatically.
What to know
The maximum file size is 100 MB, duration is five minutes and resolution is Full HD. The server runs one job at a time. For long videos, trim the file or use a desktop converter. If you need a smaller file for the web, keep the original WebM or convert it to a lower resolution.
Questions and answers
Why convert WebM to MP4?
MP4 is supported by almost every device and platform, while WebM may not play on iPhone, older TVs and some social networks.
Is quality lost?
The video is re-encoded with a high quality setting (CRF 23). The difference is usually invisible, but keep the original WebM for archiving.
Is audio preserved?
Yes, the audio track is encoded to AAC.
What are the limits?
Up to 100 MB, 5 minutes and Full HD resolution.