Convert video to WebM — free, online
Turn any video into a compact WebM (VP9) file — the web-native format that’s smaller than MP4 at the same quality — 100 % in your browser, nothing is uploaded.
Drop a video here
or drag & drop here
Size:
WebM is usually 20–40% smaller than the same video as MP4.
Working…
How to convert video to WebM
- Upload your videoDrop an MP4, MOV or any common format. It never leaves your browser.
- Pick a qualityBalanced is perfect for most uses; go high for detailed footage.
- Convert and downloadPress “Convert to WebM” and save your watermark-free file.
Popular uses
Tap a preset, then upload and convert:
Frequently asked questions
What is WebM and why would I use it?
WebM (with the VP9 codec) is an open, royalty-free video format built for the web. It typically produces smaller files than MP4 at the same quality, which means faster page loads and less bandwidth. It’s natively supported by Chrome, Firefox, Edge and Android — and by Safari 14.1 and newer.
Does my video leave my device?
Never. The conversion (a WebAssembly build of FFmpeg, loaded unmodified from a CDN) runs entirely on your device. Your file is processed locally and is never uploaded to any server.
Is converting video to WebM really free? Any watermark?
Yes — 100% free with no signup and no watermark, and there are no limits on how many files you convert (files up to 500 MB are supported). Your WebM downloads straight to your device, ready to use.
Which quality should I choose?
“Balanced” is right for most videos — noticeably smaller than the MP4 with quality you won’t miss on screen. Choose “High quality” for videos you’ll watch closely (tutorials, demos), and “Small file” when size matters most, like embedding in a web page.
Will the WebM keep my video’s audio?
Yes — the original audio track is carried over untouched, so nothing is re-encoded and the sound is identical to the source.
Which video formats can I upload?
MP4, WebM, MOV, MKV and most common video formats work. Files up to 500 MB are supported.
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