How to use the WEBM converter
- Choose a file. Drop a WEBM file to convert it to something else, or any other video to convert it to WEBM.
- Check "Convert to". The converter picks MP4 for WEBM files and WEBM for everything else; change it if you need something different.
- Adjust quality if you want a smaller or higher-quality file.
- Click Convert and download the result.
What is a WEBM file?
WebM is an open, royalty-free video format made by Google for the web. It is based on Matroska and uses VP8, VP9 or AV1 video with Opus or Vorbis audio. Browsers play it natively, and many screen recorders and download tools produce WebM files.
WEBM is mainly used for web video, browser screen recordings and HTML5 players. It plays on Chrome, Firefox, Edge, Android and VLC; support in older iPhones, PowerPoint and many editors is limited.
WEBM at a glance
| Full name | WebM |
|---|---|
| Type | Video |
| Created by | Google, 2010 |
| Compression | Lossy |
| Typical codecs | VP9 or VP8 (sometimes AV1) + Opus or Vorbis |
| Can be created here | Yes |
Pros and cons of WEBM
Good
- Royalty-free
- Small files with VP9
- Plays in every major browser
Not so good
- Many editing apps and older Apple devices cannot open it
- Encoding VP9 is slow
Common WEBM problems and fixes
A WEBM will not import into Premiere, iMovie or PowerPoint
Convert it to MP4 (H.264), which every editor accepts.
You only need the sound from a WEBM
Use WEBM to MP3 to extract the audio.
Popular WEBM conversions
Frequently asked questions
How do I open a WEBM file?
WEBM files play on Chrome, Firefox, Edge, Android and VLC; support in older iPhones, PowerPoint and many editors is limited. If yours will not open, convert it to MP4 on this page; that format plays on any device.
How do I convert a file to WEBM?
Drop any video on this page. "Convert to" is set to WEBM automatically for files that are not WEBM already.
How much does the WEBM converter cost?
Nothing. It is free with no registration, no watermark and no limit on how many files you convert.
Are my files safe?
Yes. Files are converted locally in your browser and are never uploaded. When you close the page, nothing is left behind.
Is WEBM lossy?
Yes, WEBM normally uses lossy compression, which removes detail you are unlikely to notice to keep files small.