How do I know whether my OGG holds Vorbis, Opus or FLAC?

You generally do not, and for this page it does not matter, since FFmpeg reads the codec identifier from the first Ogg page and picks the right decoder itself. It matters for one decision only, namely that if the file turns out to hold FLAC, the source is lossless and 320 kbps is worth taking rather than the default.

A game's .ogg asset converts but sounds like it is missing part of the track. Is that the tool?

Almost never. Game audio is frequently exported as loop bodies with separate intro files, or as one channel of a layered mix that the engine combines at runtime, so what you hear in isolation is genuinely incomplete. The conversion itself re-encodes all of whatever audio stream FFmpeg's own default selection picks, end to end.

Why is the output MP3 sometimes larger than the OGG it came from?

Vorbis is a more efficient codec than MP3 at the same perceived quality, and most Ogg files are encoded in variable-bitrate quality mode rather than at a fixed rate. Re-encoding a modest Vorbis file at a flat 192 kbps therefore adds bytes while adding nothing you can hear. Dropping to 128 kbps usually restores the size balance.

Does a Telegram .oga voice message need renaming first?

No. Both .ogg and .oga are in the accepted list, and internally the module hands either one to FFmpeg under the same Ogg filename because they are the same container. Renaming would change nothing except making the file harder to find later.

Can I convert an Ogg file that also has video in it?

Yes, and you will get audio only. Ogg can multiplex Theora video alongside audio, which is how Wikipedia served video clips for years, and this converter passes -vn so any video stream is discarded before encoding. If the video is what you actually wanted, this is the wrong page.

Convert OGG to MP3 Online Free, No Upload, 100% Private

Convert OGG and OGA audio to MP3 in your browser. Free and private, with no upload, no size limit and no watermark. Game audio and voice notes welcome.

🔒 Private by design: your files are processed locally in your browser and never uploaded to any server.

Ogg is the box, Vorbis is usually what is inside

Nearly every confusion about .ogg files starts in the same place: Ogg is not a codec. It is a container, designed by the Xiph.Org Foundation in the late 1990s, which chops a stream into pages with timestamps so that audio can be served and seeked without an index sitting at the front. What goes inside those pages is a separate decision.

In practice the answer is Vorbis, the lossy codec Xiph released in 2000 as a patent-free alternative at a time when MP3 encoding carried licence fees. That combination, Vorbis inside Ogg, is what most people mean by “an OGG file”. But the same container legitimately carries Opus, FLAC, Speex and the Theora video codec, sometimes several at once.

This is why the format shows up in places you would not expect. Unity and Godot ship music and effects as Ogg Vorbis because there was nothing to pay. Audacity offers it as a default export. Wikipedia standardised on it for media. Telegram saves voice messages in it. Anywhere free software had to choose an audio format without a legal department involved, this is what it chose.

MP3 is the opposite trade. It is technically older and less efficient, its patents have long since expired, and it is the one format that plays on absolutely everything: iPhones, car head units, cheap MP3 players, transcription services, video editors and web upload forms that check the extension before they check anything else.

Dropping an .ogg or .oga file in

Drop your file onto the box above, or click Choose a file to browse. Both .ogg and .oga are accepted.
Pick an Audio quality. 192 kbps (recommended) is the default and covers game music, voice notes and exports alike.
Click Convert OGG to MP3. A progress bar with a Cancel button appears while FFmpeg runs.
Download the MP3. The filename is your original with the extension replaced.

The .oga extension and Xiph’s naming rules

If you have downloaded a voice message from Telegram or pulled a file from Wikimedia Commons, you may have met .oga and assumed it was something else. It is not. In 2007 Xiph published a naming recommendation to clear up exactly the confusion described above: .ogg should be reserved for Vorbis audio, .oga used for audio in an Ogg container with any other codec, .ogv for video, and .ogx for multiplexed streams.

The recommendation was only partly adopted, so today the extension tells you almost nothing reliable. The converter treats that pragmatically. Both extensions are accepted and both are handed to FFmpeg under the same Ogg filename, because the demuxer reads the codec identity from the stream itself rather than trusting the name.

Theora, cover art and the streams that get dropped

An Ogg file can carry more than the track you want. Cover art is commonly stashed in the comment header, and a multiplexed file can hold Theora video next to the audio. Left to itself, FFmpeg would try to carry those through into the output.

The converter passes -vn ahead of the codec arguments, which drops every non-audio stream before encoding begins. What you download is audio and nothing else. That is the right default for a file destined for a car stereo or a transcription service, and it is worth knowing about if you were expecting the artwork to follow the audio across.

Bitrate for a game asset versus a voice note

The Audio quality rungs map straight to the bitrate given to the LAME encoder. 320 kbps (highest quality) is worth it when the Ogg turned out to hold FLAC, or when the source is a soundtrack you want to keep. 192 kbps (recommended) is the sensible middle for extracted game music and general listening. 128 kbps (smaller file) is aimed at speech, where the extra bits buy nothing audible.

Be aware that Vorbis usually encodes in a quality-targeted variable-bitrate mode rather than at a fixed rate, so a small source file re-encoded at a flat 192 kbps can come out larger than it went in. That is normal and it is not a sign anything went wrong.

If the file you actually have ends in .opus, OPUS to MP3 is the page for it, and for old phone recordings AMR to MP3 handles the narrowband voice case with a bitrate ladder scaled to match. The rest of the audio tools cover cutting, joining and levelling once the MP3 exists, and the audio converter and editing tools guide puts them in order.

Convert OGG to MP3