WebM to OGG Converter — Free, Online, No Upload

WebM is a container format that bundles video and audio together for web streaming. When you want to distribute just the audio from a WebM recording — a browser-captured lecture, a screen recording with commentary, or a web conference call — you need to extract it from the video container. OGG gives you that audio in an open format that is natively understood by the tools that already speak WebM's language.

Both WebM and OGG share the Xiph.Org codec family. WebM audio often uses Opus or Vorbis — the exact same codecs that live in OGG containers. When a WebM's sound is Vorbis, it is copied into the OGG with no re-encoding, keeping its quality exactly. Most newer WebM files use Opus instead, which this converter re-encodes to Vorbis at quality 5 (about 160 kbps). The result is an audio-only file that is smaller than the original WebM and works in Linux media players, Firefox, Icecast streaming servers, and open-source tools.

OGG is the preferred audio format for Unity and Godot game engines, Icecast radio streams, and Linux desktops. If you recorded browser audio for use in a game, an open-source application, or a Linux environment, converting from WebM to OGG is often the most efficient path. Note that OGG lacks native support on Apple devices and older hardware.

Typical sizes: WEBM 50–200 MB (1 minute 1080p); OGG 2–5 MB (3-minute song).

OGG output uses Vorbis quality level 5, about 160 kbps.

Re-encoding one lossy format into another adds a second round of compression.