Video format
What is a WEBM file?
WEBM is an open, royalty-free video format built for the web, typically using the VP9 codec for strong compression at small sizes.
Google introduced WebM alongside WebP as a royalty-free alternative built specifically for the browser, most commonly pairing the VP9 (or newer AV1) video codec with Opus audio in a lightweight container. That combination tends to compress noticeably better than the more universally-compatible H.264/MP4 pairing, which is why WebM shows up heavily in web video embeds and platforms like YouTube use it internally, even when they serve MP4 for broader device compatibility.
How to open a WEBM file
WEBM files open readily in Chrome, Firefox, Edge (native), VLC Media Player. For real editing rather than just viewing, reach for DaVinci Resolve, Adobe Premiere Pro (with an extension).
Strengths & limitations
Good for
- excellent compression for web delivery
- royalty-free, no licensing overhead
Watch out for
- less commonly used than MP4 outside web contexts
Convert WEBM files
Orbfile can convert WEBM both ways, entirely in your browser — pick a direction below:
Frequently asked questions
What does a WEBM file contain?+
WEBM is an open, royalty-free video format built for the web, typically using the VP9 codec for strong compression at small sizes.
Can I convert WEBM for free?+
Yes — Orbfile's video converter handles WEBM for free, with no file limit, watermark, or account, and it runs entirely in your browser.
Is converting a WEBM file safe and private?+
Yes. Orbfile processes WEBM files locally on your device using WebAssembly — nothing is uploaded to a server, so there's nothing to leak or store.
Who created the WEBM format?+
WEBM was developed by Google / WebM Project, first released around 2010.
Browse the full file format guide.