Why is there a quality scale instead of a bitrate?

Because Vorbis is designed as a variable-bitrate codec. A quality number tells the encoder how much detail to preserve and lets it decide where to spend the bits, which is more useful than a flat rate for music that varies in density.

Is Vorbis better than MP3 at the same rate?

Generally yes, particularly below 160 kbps, since it was designed later and handles detail better at low rates. The reason to still choose MP3 is compatibility rather than sound.

Will an Ogg file play on a phone?

On Android, yes. On an iPhone it will not play in the built-in music app. If the file is going to Apple hardware, M4A or MP3 is the practical choice.

What is the constant-bitrate option for?

Fixed-rate delivery where a system expects predictable bandwidth, such as a constrained streaming setup. For ordinary listening the variable quality scale gives a better result for the same average size.

Does anything leave my computer?

No. The decoder and the Vorbis encoder both run in the browser. The encoder core is a static download from this site, and your audio is never sent anywhere.

OGG Converter

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OGG Converter writes Ogg Vorbis files, a format built around variable quality rather than a fixed bitrate. It is the open, royalty-free option for music that is staying on a computer or a browser.

What is OGG Converter?

Drop a file, choose a quality level, and encode. The result is a standard Ogg Vorbis file that plays in browsers, on Android and in desktop players.

The controls:

A quality scale of 2, 5, 7 and 10, labelled Low through Best, where the default middle setting suits most listening.
An advanced escape hatch to a constant bitrate (CBR) of 96, 128, 192 or 256 kbps, for pipelines that insist on a fixed rate.
The shared advanced panel for channel mode, sample rate and metadata.

The format explains the shape of those controls. Vorbis is variable bitrate by nature: the encoder is handed a quality target and spends bits according to how demanding each passage is, so a sparse verse costs less than a dense chorus. That is why the primary control is a quality number rather than a bitrate, and why the fixed-rate option is tucked away as an alternative instead of being the main ladder. Each step of the quality scale is a discrete target rather than a continuum, and the default sits deliberately in the middle: below it the encoder starts thinning detail in cymbals and reverb tails, and above it the returns shrink quickly while the file grows in step. Choosing between the four levels is therefore a judgement about the material rather than a sum to work out, and the labels are there to be taken literally.

Vorbis was designed well after MP3 and holds detail better in the 96 to 128 kbps region, which is most of the reason to choose it. It is also open and royalty-free, which matters when software cannot license a proprietary encoder and is why the format turns up in open-source players and game engines. In practice a file encoded here lands at a size close to an MP3 of the same average rate, with the difference showing up as extra detail in quiet passages rather than as a different overall file size. Container-wise the extension is honest about the contents: an Ogg file can, in principle, carry other codecs, but everything produced here is Vorbis audio in the usual structure.

The trade is reach rather than quality. Browsers, Android and desktop players handle Ogg Vorbis comfortably, while Apple's built-in music playback does not, so an Ogg file is a poor choice for anything headed to an iPhone or an older car stereo. Since Vorbis is not one of the formats with an in-process encoder, the job uses the bundled ffmpeg core, which downloads once and is cached. Metadata can be preserved when the encoder path is used, though album art is not something the tool attempts to carry into this container.

Where it stops:

No native in-process path, so the first conversion uses the encoder download.
No artwork passthrough, because the Ogg container is not one the tool attempts to carry pictures through.
Nothing above the quality scale's top level: there is no lossless Vorbis output.
One file per run.
Apple's built-in players do not read Ogg Vorbis, so it is the wrong target for an iPhone library.

How to use OGG Converter

Drop an audio file onto the panel.
Pick a quality level, keeping the middle setting unless the material is unusually demanding.
Switch to a constant bitrate only if a device or pipeline requires a fixed rate.
Convert, then listen back before deleting the source.

When to use OGG Converter vs related tools

OGG Converter is the open-format choice, best for music libraries, game audio and anything distributed alongside royalty-free software. MP3 Converter is the safer target when the file has to play everywhere, OPUS Converter is the newer and more efficient option for low bitrates, and Codec Compatibility Reference lists which devices actually read each container before you commit a library to one.

Privacy & Security

This tool runs entirely in your browser — no data ever leaves your device. There is no server round-trip, no upload, no logging, and no account required. Your input is processed locally using client-side JavaScript and is never stored, transmitted, or accessible to anyone else. When you close the tab, everything disappears.