Audio Converter

Make Your Opus Audio Compatible With Unity, Godot, and Classic Media Players

Opus and OGG Vorbis both live in the Ogg container — but the codec inside is different. Unity and Godot import OGG Vorbis natively, not Opus. Many media players and audio libraries also expect Vorbis when they see a .ogg file. Convert your Opus to OGG Vorbis and your audio works everywhere the open-source ecosystem expects it.

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Make Your Opus Audio Compatible With Unity, Godot, and Classic Media Players

Free Tool

Audio Format Converter

Upload any audio file, choose an output format, and download the converted result. Supports MP3, WAV, FLAC, AAC, OGG, ALAC, WMA, Opus and M4A.

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Game developer importing audio assets into a game engine

Import Directly Into Unity and Godot Without Extra Steps

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Import Directly Into Unity and Godot Without Extra Steps

Unity's AudioClip importer and Godot's AudioStreamOggVorbis resource both work natively with OGG Vorbis (.ogg files carrying Vorbis audio). Opus files, even though they also use the Ogg container, carry a different codec that these engines do not handle the same way. Converting Opus to OGG Vorbis means your audio asset imports cleanly into both engines without any additional encoding step or plugin.

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Desktop media player displaying an audio library

Plays in Every Media Player That Reads the OGG Extension

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Plays in Every Media Player That Reads the OGG Extension

Many media players, operating system audio handlers, and audio libraries associate the .ogg extension with Vorbis audio specifically. When a .opus file is renamed to .ogg — which happens during casual file sharing — some players encounter the unexpected Opus codec and either fail to play or exhibit playback errors. Converting to genuine OGG Vorbis guarantees the file plays correctly in VLC, foobar2000, Winamp, Rhythmbox, Amarok, and any other player that reads .ogg files.

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Linux desktop with a music library application open

The Open-Source Standard for Stored Music Libraries

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The Open-Source Standard for Stored Music Libraries

OGG Vorbis is the established open-source format for storing and distributing music. Linux distributions use it as the default compressed audio format. Bandcamp distributes music in OGG Vorbis. Game asset stores on itch.io package audio as OGG. Royalty-free music libraries and Creative Commons releases distribute OGG Vorbis files because it is the universally understood open audio format for stored content — not Opus, which is optimised for real-time transmission.

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How It Works

Three steps from Opus to an OGG Vorbis file

Upload your Opus file

Drop your .opus file onto the tool or click to browse. Recordings from Discord, WebRTC applications, and any Opus source are accepted.

Convert to OGG Vorbis

Click "Convert". FFmpeg decodes the Opus audio and re-encodes it as Vorbis inside an Ogg container, producing a standard .ogg file.

Download your OGG file

Preview the output, then download your .ogg file ready to import into Unity, Godot, a media player, or any open-source audio pipeline.

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Deep Dive

Opus vs OGG Vorbis: Two Codecs, One Container

Opus and OGG Vorbis are both open-source, patent-free, and use the Ogg container format — but they are entirely different codecs designed for different purposes.

Game developers, Linux users, and audio engineers working with OGG audio

The Ogg Container: What Both Formats Share

Both Opus and OGG Vorbis use the Ogg bitstream container format, developed by Xiph.Org. The container handles packet framing, seeking, and multiplexing. The codec — the actual compression algorithm — is stored inside the container and is different in each case. A .opus file contains Opus-encoded audio. A .ogg file typically contains Vorbis-encoded audio. The same container, two different codecs with very different design goals.

ContainerOgg (Xiph.Org) — used by both

.opus filesOgg container + Opus codec

.ogg filesOgg container + Vorbis codec (conventional)

Technically, .ogg files can carry Opus audio, but by convention .ogg means Vorbis. Using .opus for Opus audio is the standard the IETF specifies.

Opus: Designed for Real-Time Internet Transmission

Opus was standardised by the IETF in 2012 (RFC 6716) specifically for low-latency internet audio. It combines SILK (speech) and CELT (music/general) into a single adaptive codec. Opus excels at very low bitrates, minimises codec latency to as little as 2.5 ms, and is the required audio codec in the WebRTC specification. Discord, YouTube, WhatsApp, and Zoom all use Opus. It was optimised for live transmission, not stored music libraries.

Optimised forReal-time streaming, VoIP, WebRTC, low-latency applications

Bitrate range6 kbps to 510 kbps

Game enginesNot the native import format for Unity or Godot Vorbis resources

OGG Vorbis: Designed for Stored Music

Vorbis was developed by Xiph.Org specifically as a patent-free replacement for MP3 for storing and distributing music. It uses a variable bitrate model optimised for perceptual quality at typical music listening bitrates (96-320 kbps). Vorbis does not target low-latency streaming — it buffers larger frames for better compression efficiency at normal music bitrates. It has been the de facto open-source music format since the early 2000s and is deeply integrated into the Linux audio stack, game engines, and open-source media players.

Optimised forStored music, game assets, music libraries, offline playback

Typical bitrateq3 (112 kbps) to q8 (256 kbps) for music

Game enginesUnity AudioClip and Godot AudioStreamOggVorbis native format

Quality: Transcoding Between Two Lossy Codecs

Both Opus and OGG Vorbis are lossy codecs. Converting Opus to OGG Vorbis requires decoding Opus back to PCM and re-encoding as Vorbis — introducing a second lossy compression pass. Using a high Vorbis quality level (q7 or above, corresponding to roughly 224 kbps) keeps the additional quality penalty minimal for typical music content. The result is suitable for game assets, music libraries, and any scenario where Vorbis compatibility is required.

Quality impactMinimal at high Vorbis quality levels (q7+)

Best practiceConvert at the highest quality setting the destination accepts

If the original Opus source is a high-quality recording (96 kbps or above), the transcoded OGG Vorbis at q7+ will be audibly acceptable for game and media player use.

Our converter uses FFmpeg's libvorbis encoder at a high quality setting to minimise transcoding quality loss from the Opus source.

Benefits

Why Convert Opus to OGG

🎮

Unity and Godot Compatible

OGG Vorbis is the native compressed audio format for Unity AudioClip and Godot AudioStreamOggVorbis — imports cleanly without additional encoding steps.

🐧

Linux and Open-Source Native

OGG Vorbis is the standard compressed audio format across Linux distributions, open-source media players, and the Xiph.Org multimedia stack.

🎵

Works in Every .ogg-Compatible Player

VLC, foobar2000, Winamp, Rhythmbox, and every other media player that reads .ogg files expects Vorbis — genuine OGG Vorbis plays reliably in all of them.

🔓

Patent-Free Like Opus

OGG Vorbis carries the same patent-free, royalty-free guarantee as Opus — safe to distribute in any commercial game, app, or open-source project.

Who Uses It

Who Converts Opus to OGG

Game developers importing audio into Unity or Godot, Linux users maintaining Vorbis-based music libraries, open-source project contributors packaging audio assets, and developers receiving Opus from web APIs who need Vorbis for their pipeline.

Game developers, Linux users, and open-source contributors working with OGG audio

Game Developers Importing Audio Into Unity

Unity's AudioClip uses OGG Vorbis for compressed streaming audio. Developers who record voice lines, capture Discord calls in Opus, or receive Opus audio from external tools need to convert to OGG Vorbis before importing into a Unity project. The .ogg file imports directly with no additional processing needed.

Unity importSet Compression Format to "Vorbis" — matches OGG Vorbis source

Godot Developers Adding Music and Sound Effects

Godot uses AudioStreamOggVorbis for streaming background music and AudioStreamSample for short sound effects. OGG Vorbis is the recommended format for music tracks in Godot. Opus audio from external sources needs to be converted to OGG Vorbis before it can be used as a streaming audio resource in a Godot project.

Linux Users Maintaining a Vorbis Music Library

Linux audio players like Rhythmbox, Amarok, and Clementine, as well as music library managers, are built around Vorbis as the primary compressed audio format. Voice recordings, Discord exports, or audio files received in Opus format integrate into these libraries after conversion to OGG Vorbis.

Open-Source Project Audio Contributors

Open-source projects that distribute audio assets — sound effect packs, background music, voice acting contributions — use OGG Vorbis as the interchange format. Contributors who record or export in Opus need to convert to OGG Vorbis before submitting assets so the entire project team can work with a consistent, universally understood format.

Developers Receiving Opus from Web APIs

Browser MediaRecorder and WebRTC APIs produce Opus audio. Developers who capture audio in the browser and pass it to a backend processing pipeline that expects Vorbis — for example, a game server ingesting player-submitted audio for in-game voice content — need to convert Opus to OGG Vorbis before storage or processing.

Audio Asset Store Publishers on itch.io

Sellers of royalty-free sound effects and music on itch.io and similar platforms distribute OGG Vorbis as one of the standard formats alongside MP3 and WAV. Publishers who produce audio in Opus format need to convert to OGG Vorbis before packaging their asset bundles so buyers using Unity, Godot, or open-source tools receive the format they expect.

Converts using FFmpeg on dedicated servers.

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Related Tools

Frequently Asked Questions

What is the difference between Opus and OGG Vorbis?

Both use the Ogg container but carry different codecs. Opus (RFC 6716) was designed for real-time internet audio — low latency, excellent at very low bitrates, used by Discord, YouTube, and WebRTC. OGG Vorbis was designed as a patent-free replacement for MP3 for stored music — variable bitrate, optimised for music listening quality, the native audio format for Unity, Godot, and Linux. Converting Opus to OGG Vorbis changes the codec inside the container from Opus to Vorbis.

Why does Unity need OGG Vorbis instead of Opus?

Unity's built-in audio engine and AudioClip importer use Vorbis as their native compressed codec. While Unity can theoretically decode Opus through plugins, the standard workflow and the "Compressed In Memory" and "Streaming" AudioClip modes all use Vorbis compression. Supplying OGG Vorbis source files ensures clean, codec-matched imports without additional tooling.

Does converting Opus to OGG Vorbis lose quality?

Yes — both are lossy codecs, so decoding Opus and re-encoding as Vorbis introduces a second lossy compression pass. The additional quality loss is minimal when using a high Vorbis quality setting (q7 or above, roughly 224 kbps). For game assets and music library use, the result is audibly acceptable. Keep the original Opus file if you need to re-encode at a different quality later.

Can I just rename a .opus file to .ogg?

Renaming the extension does not change the codec inside the file. A renamed .opus file still contains Opus audio, not Vorbis. Media players and game engines that expect Vorbis when they open a .ogg file may fail to play or import it correctly. A proper conversion using FFmpeg decodes Opus and re-encodes as Vorbis, producing a genuine .ogg file.

Does OGG Vorbis work in Godot?

Yes. Godot imports .ogg files as AudioStreamOggVorbis resources for streaming music. For short sound effects, WAV is preferred in Godot. For background music and ambient audio tracks, OGG Vorbis is Godot's recommended format.

Is there a file size limit?

The upload limit is 100 MB per file. Most Opus audio files are well within this limit.

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