Audio Converter

Turn Your AAC Audio into an Open-Source OGG for Games and Linux

Upload your AAC file and get an OGG Vorbis that imports natively into Unity and Godot, plays in every Linux media player, and serves via HTML5 web audio without licensing concerns.

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Turn Your AAC Audio into an Open-Source OGG for Games and Linux

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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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Import AAC Music Tracks into Unity or Godot as OGG Assets

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Import AAC Music Tracks into Unity or Godot as OGG Assets

Unity recommends OGG Vorbis for compressed music and ambient audio. Godot imports OGG natively as its primary compressed audio format. Neither engine recognizes AAC as a valid audio clip format. Game developers and composers who receive or own music as AAC — from Apple Music, iTunes purchases, or iPhone recordings — can convert to OGG and drop the file directly into a Unity or Godot project.

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Linux developer at a laptop with a music player and terminal open on the screen

Replace AAC with OGG in Open-Source and Linux Audio Pipelines

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Replace AAC with OGG in Open-Source and Linux Audio Pipelines

Linux distributions do not include AAC decoder support by default due to patent licensing. OGG Vorbis is a patent-free open standard natively supported by every Linux distribution without any additional package. Developers migrating audio assets from an Apple or AAC-based workflow to a Linux server, open-source media pipeline, or GPL-licensed project can convert to OGG to eliminate the AAC licensing dependency entirely.

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Serve AAC-Sourced Audio via HTML5 Web Audio Without Licensing Concerns

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Serve AAC-Sourced Audio via HTML5 Web Audio Without Licensing Concerns

AAC carries patent royalties — historically a concern for open-source projects and smaller developers who need to distribute audio codecs. OGG Vorbis is completely patent-free. Web developers who hold audio in AAC but want to serve it through HTML5 on Chrome, Firefox, and Edge without codec licensing considerations can convert to OGG. Firefox has never shipped with AAC support on Linux without a system codec; OGG works everywhere without that dependency.

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How It Works

Three steps to a patent-free OGG from your AAC source

Upload your AAC file

Drop your .aac or .m4a file onto the tool or click to browse. iTunes downloads, iPhone recordings, and any AAC audio file are accepted.

Convert to OGG

Click "Convert". FFmpeg decodes the AAC to PCM and encodes it as OGG Vorbis — a single re-encoding pass producing a patent-free open-source audio file.

Download your OGG file

Download your .ogg file ready to import into Unity or Godot, copy to a Linux music player, or serve via HTML5 web audio.

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Deep Dive

AAC to OGG: From Licensed Codec to Open-Source Standard

AAC is a high-quality licensed codec from the MPEG ecosystem. OGG Vorbis is a patent-free open standard from Xiph.Org. Converting between them serves open-source projects, game engines, and Linux environments where patent-free audio is a requirement or strong preference.

Game developers, Linux users, and open-source web developers converting AAC to OGG

AAC: High Quality, Patent-Licensed

AAC (Advanced Audio Coding) is a lossy codec developed by Fraunhofer IIS, AT&T Bell Labs, Sony, and others as part of the MPEG-4 standard. It provides excellent audio quality — noticeably better than MP3 at the same bitrate. AAC is the default codec for Apple devices, iTunes, YouTube, and most modern streaming platforms. However, AAC is encumbered by patents, which historically made it a concern for open-source distributions, GPL-licensed projects, and Linux package maintainers.

TypeLossy, MPEG-4 codec, patent-licensed (Fraunhofer IIS / Via Licensing)

ContainerUsually .m4a (MPEG-4) or raw .aac (ADTS)

Linux supportRequires gstreamer-plugins-bad, ffmpeg, or similar; not in default minimal installs

Most AAC patents have expired or are expiring, but legacy toolchains and open-source policy may still mandate patent-free formats.

OGG Vorbis: Patent-Free, Open Standard

OGG Vorbis is a lossy audio codec from Xiph.Org, completely free of patents and royalties. It is the recommended compressed audio format for Unity, the native format for Godot, and the codec natively supported by every Linux distribution without licensing requirements. Firefox, Chrome, Edge, and Opera all support OGG Vorbis natively in HTML5 audio. OGG is the standard choice for open-source projects, game engines, and Linux audio pipelines where patent-free operation is required.

TypeLossy, open-source, patent-free (Xiph.Org)

Game enginesUnity recommended format for compressed music; Godot native import format

Browser supportChrome, Firefox, Edge, Opera natively; Safari requires a polyfill

OGG files are typically 5 to 10 times smaller than WAV at equivalent perceived quality.

Quality When Converting AAC to OGG

Both AAC and OGG Vorbis are lossy codecs. Converting between them requires decoding the AAC to PCM and re-encoding it as OGG — two lossy passes. Some quality is lost at each step. The quality ceiling of the resulting OGG is set by the original AAC encoding. At a high OGG quality setting, the re-encoding step introduces minimal additional degradation. If a lossless source is available — FLAC or WAV — encoding OGG from that source produces a better result.

AAC -> OGGTwo lossy passes: quality ceiling set by original AAC encoding

FLAC -> OGGOne lossy pass from perfect PCM: best achievable OGG quality

When both AAC and a lossless source are available, always prefer converting the lossless source to OGG.

When OGG Is the Right Destination from AAC

OGG is the right destination when the audio must work in Unity or Godot, must play on a Linux system without additional codec installation, must be served from a web server without AAC licensing concerns, or must be distributed in an open-source project that requires patent-free formats. For cross-platform consumer playback including iPhone and car stereos, AAC or MP3 offer broader reach.

Use OGG forUnity, Godot, Phaser, Linux players, HTML5 Chrome/Firefox/Edge, GPL projects

Use AAC/M4A forApple devices, iTunes, Safari, iPhone, Apple Music

Use MP3 forCar stereos, universal device sharing, every platform without exception

Our converter uses FFmpeg to decode AAC and encode as OGG Vorbis at a high quality setting.

Benefits

Why Convert AAC to OGG

🎮

Unity and Godot Ready

OGG is the recommended compressed format for Unity and the native import format for Godot. Drop the converted file directly into your game project asset folder.

🔓

Patent-Free and Open-Source

OGG Vorbis carries no patent royalties. Use it in GPL-licensed projects, open-source repositories, and Linux distributions without licensing restrictions.

🐧

Native on Every Linux System

OGG plays natively in every Linux music player and media stack without any additional codec package.

⚡

Fast Conversion

Most AAC files convert to OGG in under 30 seconds on dedicated FFmpeg servers.

Who Uses It

Who Converts AAC to OGG

Game developers adding AAC-sourced music to Unity or Godot projects, Linux users standardizing audio libraries to patent-free formats, web developers serving open audio assets, open-source contributors replacing licensed codecs, and indie game composers delivering from Apple-sourced recordings.

Game developers, Linux users, and open-source contributors converting AAC to OGG

Game Developers Adding Apple-Sourced Music to Unity or Godot

Composers who deliver game music from an Apple ecosystem often export or share tracks as AAC or M4A. Unity's recommended compressed audio format is OGG Vorbis; Godot imports OGG natively. Game developers who receive AAC tracks from composers can convert to OGG and import directly into the engine without licensing concerns or unsupported format errors.

UnitySet AudioClip to Compressed (Vorbis); OGG recommended for music and ambient audio

GodotDrag .ogg into the FileSystem dock; appears as AudioStreamOggVorbis automatically

Linux Users Converting Apple or AAC Audio Libraries

Linux users who receive audio from Apple device owners or download content in AAC format sometimes encounter playback issues on minimal Linux installations where AAC codecs are not in the default package set. Converting to OGG produces a file that plays in Rhythmbox, Clementine, Audacious, and every other Linux media player without needing to install additional codec packages.

OGG supportBuilt into GStreamer, PulseAudio, and every major Linux audio stack by default

Open-Source Project Contributors Replacing Licensed Audio

Open-source repositories that include audio assets — game sound effects, UI audio, demo tracks — prefer or require patent-free formats. Contributors who have recordings or effects in AAC can convert to OGG before committing to a repository, ensuring the project's entire audio library is patent-free and compliant with open-source distribution requirements.

Web Developers Building Patent-Free Audio for Firefox on Linux

Firefox on Linux historically could not play AAC audio without a system-level codec installation because AAC patent licensing prevented shipping a decoder in the open-source build. OGG Vorbis has always been supported natively in Firefox on all platforms. Web developers who need guaranteed playback across all Firefox users regardless of OS can convert AAC assets to OGG as a reliable baseline.

Firefox LinuxOGG plays natively without system codec; AAC may require gstreamer-plugins-bad

Indie Game Composers Delivering for Open-Source or Freeware Releases

Indie composers who produce game music in Apple software and export as AAC or M4A can convert to OGG for delivery to game developers releasing under open-source or freeware licenses. OGG is the standard format for free and open-source game audio distributions such as OpenGameArt, FreeSound OGG uploads, and similar repositories.

Streaming Server Operators Moving from Apple to Open Formats

Self-hosted streaming servers running Navidrome, Airsonic, or similar open-source platforms transcode audio on demand. Operators who want to minimize server-side AAC licensing concerns or simplify their codec stack can convert stored AAC files to OGG, ensuring the library is served and transcoded using entirely patent-free codecs.

Converts using FFmpeg on dedicated servers.

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Related Tools

Frequently Asked Questions

Will converting AAC to OGG reduce audio quality?

Yes, slightly. Both AAC and OGG Vorbis are lossy codecs. Converting between them requires decoding the AAC to PCM and re-encoding it as OGG — two lossy passes. The quality of the resulting OGG is capped by the original AAC encoding. At a high OGG quality setting the re-encoding step adds minimal audible degradation for most listeners. If a lossless source such as FLAC or WAV is available, converting from that produces better OGG quality.

Why does Unity use OGG instead of AAC?

Unity recommends OGG Vorbis for compressed music and ambient audio because OGG is patent-free and open-source, which simplifies licensing for games distributed commercially or through open platforms. AAC requires patent licensing agreements that can complicate distribution. Unity does support AAC on some platforms, but OGG is the cross-platform standard for compressed audio in Unity projects.

Does OGG work in all browsers?

Chrome, Firefox, and Edge support OGG Vorbis natively in HTML5 audio and the Web Audio API without any plugin. Safari on macOS and iOS does not support OGG natively. For web projects that must support all browsers including Safari, serve a AAC or MP3 fallback alongside the OGG, or use the <source> element to provide both formats.

Why can't Linux play AAC files without extra packages?

AAC playback on Linux requires a decoder that implements the AAC standard under patent license. Since most Linux distributions are built entirely from open-source software that cannot include patent-encumbered code by default, AAC support requires installing additional packages such as gstreamer-plugins-bad or ffmpeg with non-free components. OGG Vorbis is patent-free and ships in the default codec stack of every major Linux distribution.

Is OGG the same as OGG Vorbis?

OGG is a container format. OGG Vorbis is the combination of the OGG container with the Vorbis audio codec inside it. When people refer to "OGG audio," they almost always mean OGG Vorbis. The OGG container can also hold other codecs such as FLAC (OGG FLAC) or Opus (OGG Opus), but for game engines, Linux players, and web audio, OGG Vorbis is the standard intended format.

Is there a file size limit?

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

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