Open VP9/Opus format built for the web. Smaller than MP4 at equal quality. Best for video embedded in web pages.
At a glance
| Category | Video |
|---|---|
| MIME | video/webm |
| Extensions | .webm |
| Compression | Lossy |
| Defined by | |
| Since | 2010 |
| Open | ✓ |
Convert from WebM (12)
WebM → MP4WebM → MKVWebM → MOVWebM → AVIWebM → GIFWebM → MP3WebM → WAVWebM → M4AWebM → OGGWebM → OpusWebM → FLACWebM → AIFF
Convert to WebM (26)
MP4 → WebMMOV → WebMMKV → WebMAVI → WebMWMV → WebMFLV → WebMMPG → WebM3GP → WebMTS → WebMOGV → WebMMP3 → WebMWAV → WebMFLAC → WebMM4A → WebMOGG → WebMOpus → WebMAIFF → WebMWMA → WebMAMR → WebMGIF → WebMPNG → WebMJPG → WebMWebP → WebMBMP → WebMTGA → WebMPSD → WebM
Comparisons
Questions
What is a WebM file?
Open VP9/Opus format built for the web. Smaller than MP4 at equal quality. Best for video embedded in web pages.
How do I open a .webm file?
Drop it on this page: we read it in your browser and can convert it to MP4, MKV, MOV, AVI, GIF.
How do I convert a WebM?
Pick a target below: 12 conversions from WebM are available, all in your browser.