justyourvideoMP4 to WebM Converter
MP4 or any other video to WebM for the web.
- 100% Free
- No Sign Up
- Works in Your Browser
MP4 to WebM
Turn MP4 or any other video into WebM
Drag & drop videos
or click to browse. You can also paste.
MP4, MOV, WebM, MKV, up to 4 GB. 10 at a time.
WebM holds VP9 or VP8 video and Opus audio; other codecs are re-encoded.
Total-
Processed on your device. Nothing is uploaded.
More Video Tools
View all tools- Convert videoConvert between MP4, WebM, MOV and MKV
- MOV to MP4Turn MOV or any other video into MP4
- WebM to MP4Turn WebM or any other video into MP4
- MKV to MP4Turn MKV or any other video into MP4
- Compress videoMake video files smaller to share or upload
- Trim videoCut the start and end off a video
- Video to MP3Extract the sound from a video as MP3
- Video to GIFTurn a clip of a video into an animated GIF
- Crop videoCut away the edges of the picture
- Files uploaded
- 0
- Free to use
- 100%
- Per file
- 4 GB
How to convert MP4 to WebM
Three steps, all in your browser.
- 1
Add your videos
Drop, choose or paste one or more videos.
- 2
Adjust settings
Choose the format. Streams are copied when they fit.
- 3
Download
Save each file, or all of them as a ZIP.
MP4 to WebM Converter: what to know
WebM pairs VP9 or VP8 video with Opus audio, open formats every major browser plays. Websites use it next to MP4 to serve smaller files to browsers that support it.
JustYourVideo encodes VP9 with your browser's own encoder, so the conversion speed depends on your device. Compare the WebM size with your MP4 before deciding which to publish.
Popular uses
- Background and hero videos on websites
- Open-format archives
- Web apps that prefer royalty-free codecs
Tips for the best result
- Offer both: a WebM source first and an MP4 fallback in your video tag.
- Short, muted loops for websites can also be compressed or resized first.
Read how JustYourVideo processes videos and our privacy details. Your videos are processed on your device and never uploaded. Keep your originals and check each result before replacing anything.