WebM to MPV - Online Video Converter

Convert WebM to MPV online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.

Convert WebM to MPV

[+] Drop WebM video here or click to select WebM

Output format

MPV (MPEG-2 / AAC)

No transcoding (remux only)[i]

Mode[i]

Simple Advanced

Quality[i]

Resolution[i]

About WebM to MPV

Convert WebM to MPV. WebM pairs VP9 video with Opus audio and supports an alpha channel. MPV holds elementary MPEG video streams without a container wrapper. No audio can be stored, so pair it with a separate track..

Why convert WebM to MPV?

Smaller files with MPV lossy compression.
Keep animation and transparency where supported.
Private, no upload - runs in your browser.

WebM vs MPV

Animation	Yes	Yes
Transparency	Yes	No
Compression	lossy	lossy
Typical use	WebM pairs VP9 video with Opus audio and supports an alpha channel.	MPV holds elementary MPEG video streams without a container wrapper.

When not to convert WebM to MPV

Skip MPV for archival masters: lossy compression discards detail, so keep the WebM original.
Flatten transparency first: MPV has no alpha channel, so composite WebM over a background color.

Limits

Starting point: WebM - VP9 video with Opus audio and alpha support. Apple editors accept it unevenly; keep MP4 for editing round-trips. No audio can be stored, so pair it with a separate track. Encode MPV (MPEG-2 / AAC) from WebM at a bitrate near the source, and confirm the audio track before converting.

How conversion works

Conversion runs entirely in your browser with FFmpeg WASM. Files never leave your device.

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FAQ

How do I convert WebM to MPV?

Drop your WebM file onto this page, choose quality and codec settings, then click Convert. The result downloads as MPV instantly. All processing runs in your browser.

What codec is used for MPV?

The default codec for MPV is MPEG-2 / AAC. You can change the video and audio codec in Advanced mode.

How do you store my files?

We do not store any processed videos. All conversion happens entirely in your browser using FFmpeg WASM.