MP4 to WEBM
Upload a MP4 file and download it as WEBM. Free to start.
- Sent over HTTPS · link expires in 24 h
How it works
- Step 1:
Drop the MP4 file on the orange block above, or press “Choose MP4”.
- Step 2:
Press “Convert to WEBM”. The block shows the progress while the server converts the file.
- Step 3:
Press “Download” to save the WEBM file. On Free the link works for 24 hours.
How MP4 to WEBM conversion works
The MPEG-4 Part 14 Video format packages H.264 or H.265 video with AAC audio in a container format widely supported across every platform and device. Converting to WEBM produces a video file that packages VP8/VP9 or AV1 video with Vorbis/Opus audio in a royalty-free container designed for web streaming. This conversion changes the file's encoding, compression method, and supported feature set. When the source codecs already match the target container the streams are copied without re-encoding (zero quality loss); otherwise the video is re-encoded at a configurable quality. This makes WEBM the practical choice when the destination system requires it or when the target format offers better compatibility or compression. 1converter runs this conversion on the server: your file is uploaded encrypted over HTTPS, converted using trusted open-source libraries, and the output is held for 24 hours before automatic deletion.
Quality levels for MP4 → WEBM
| Level | File size | Speed |
|---|---|---|
| Low qualitySmallest file, basic quality | Very small | Very fast |
| Medium qualityRecommendedBalanced size and quality | Medium | Fast |
| High qualityLarger file, great quality | Large | Moderate |
| Maximum qualityLargest file, best possible quality | Very large | Slow |
Video Tip: Medium quality is ideal for web streaming. Use High or Maximum for videos you plan to edit further or archive.
When to convert
What the WEBM file is good for and why people convert to it.
- Smaller filesVP9 usually compresses better than H.264 at the same quality
- Web optimizedHTML5 standard
- Website video
- HTML5 video players
Where your file goes
- It travels to our server over an encrypted HTTPS connection and is converted there.
- The WEBM file comes back as a private link. It stops working after 24 hours on Free and 7 days on paid plans, and then the files are deleted.