Convert MP4 to WEBM
Convert MP4 to WEBM online for free. No signup required. Your files upload over an encrypted connection and are deleted after 2 hours.
Free
no account needed
Frankfurt
stored in the EU
2 hours
then files are deleted
New conversion
Any format in, the right format out
Drag and drop your files here, or import from:
Upload files up to 100 MB in MP4
How to convert MP4 to WEBM
Everything happens on this page, in any modern browser, with nothing to install.
Upload your MP4 file
Drag and drop your MP4 file or browse from your device, Google Drive, Dropbox, or OneDrive.
Convert to WEBM
Press Convert. To convert several MP4 files at once, add them all first.
Download your WEBM
Most files are ready in seconds.
What you get when you convert MP4 to WEBM
Each MP4 file you add comes back as its own download, under its original name.
- 01
With several results, Download all saves them all with one click.
- 02
If one file in a batch fails, the others still finish, and the result says what went wrong.
What MP4 and WEBM files are
MP4
MP4 is the most common video container, holding video, audio and subtitles in one file. It balances quality and file size well and plays on phones, browsers, TVs and editing software alike.
WEBM
WebM is an open, royalty-free video format backed by Google and built for the web. It pairs VP8, VP9 or AV1 video with Vorbis or Opus audio in a container based on Matroska, and it plays in modern browsers, though video editors support it less widely than MP4.
Convert your MP4 files to other formats
Choose a target format below to convert your MP4 files quickly and easily.
Convert other files to WEBM
Select a source format below to convert files to WEBM.
Frequently asked questions
Still have questions? Contact support.
Is it free to convert MP4 to WEBM?
Yes, converting MP4 to WEBM is completely free. You can convert files up to 100 MB and up to 10 files per batch, and no signup or account is required.
Will converting MP4 to WEBM affect the quality?
Our converter preserves the original quality of your MP4 files during the conversion to WEBM. The output maintains formatting, layout, and visual fidelity as closely as possible.
Can I convert multiple MP4 files to WEBM at once?
Yes. You can convert up to 10 MP4 files to WEBM in a single batch. Drag and drop all the files at once, and Novitora processes them together.
Is my data safe when converting MP4 to WEBM?
Your files upload to Novitora servers over an encrypted TLS connection and are automatically deleted 2 hours after upload. Data is stored in the EU (Frankfurt), and we follow SOC 2-aligned security practices.
What devices can I use to convert MP4 to WEBM?
Novitora works in any modern web browser on desktops, laptops, tablets, and phones. There is nothing to install: open the page, upload your MP4 file, and download the WEBM.