How do I convert MP4 to WebM?

Choose the MP4 source file you want to convert.

Upload it to mp4.now, select WebM, and start conversion.

Download and review the result before sharing or archiving it.

Reasons to convert MP4 to WebM usually come down to compatibility, file-size, or specific feature requirements. Common situations:

• An app or platform only accepts WebM uploads.
• You need a feature unique to WebM (e.g. transparency, vector scaling, animation, multi-page pages, etc.) that MP4 doesn't provide.
• You're optimising file size — modern formats often produce smaller files than the older format you started with.
• You need a single archival format across a project so files behave consistently in the same viewer.

1. Open the MP4 → WebM tool on mp4.now.
2. Drag your MP4 file onto the drop zone, or click Select files. You can drop a whole folder of files at once.
3. The output is fixed to WebM. If the format supports extra options (page size, transparency background, quality, EXIF stripping), tweak them in the right-hand panel.
4. Click Convert. The job runs on our server and finishes in a few seconds for typical photos.
5. Download the result. Files stay in storage for 24 hours and are then permanently deleted.

The entire flow is free for the first 10 jobs per day with no signup required. A free account doubles that quota; a premium plan removes the limit entirely.

• Keep a copy of the original file.
• Use a valid, non-corrupted source file.
• Review the converted result before deleting the original.