Audio Converter

Play Your Opus Audio on iPhone, iPad, and Every Apple Device

Upload your Opus file and get an AAC file that plays natively on iPhone, iPad, macOS, and Safari — no app, no codec, no workaround. Convert Discord recordings, WebRTC captures, and streaming exports to a format the Apple ecosystem understands natively.

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Play Your Opus Audio on iPhone, iPad, and Every Apple Device

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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Share Discord Recordings on iPhone Without Any App

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Share Discord Recordings on iPhone Without Any App

Discord exports voice channel recordings as Opus files. iOS does not include a native Opus decoder — tapping an Opus file on iPhone prompts a "cannot open" error or requires a third-party app. Converting to AAC produces a file that opens in the native iOS Files app, plays in the Music app, and can be shared via AirDrop or iMessage without any conversion app on the recipient's phone.

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Submit Opus Recordings to Apple Podcasts

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Submit Opus Recordings to Apple Podcasts

Apple Podcasts requires AAC (recommended) or MP3 for podcast episodes delivered via RSS. Podcast creators who record or export in Opus — whether from a VoIP tool, a self-hosted streaming server, or a Linux recording setup — need to convert to AAC before submitting an RSS feed that Apple Podcasts will ingest and distribute.

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iOS developer at a Mac desk with Xcode and an iPhone simulator on screen

Use Opus Assets in iOS Apps via AVFoundation

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Use Opus Assets in iOS Apps via AVFoundation

Apple's AVFoundation framework, which powers audio playback in every iOS and macOS app, does not decode Opus natively. iOS developers receiving Opus audio from a server or WebRTC pipeline who need to pass audio to AVAudioPlayer or AVPlayer must convert to AAC or MP3. Converting server-side or before distribution ensures the audio plays through the standard iOS audio stack.

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How It Works

Three steps to an Apple-ready AAC file

Upload your Opus file

Drop your .opus file onto the tool or click to browse. Files from Discord exports, WebRTC recordings, and Opus-based streaming tools are all accepted.

Convert to AAC

Click "Convert". FFmpeg decodes the Opus stream and re-encodes it as AAC at a high bitrate, minimizing the quality cost of transcoding between two lossy codecs.

Download your AAC file

Preview the output in the browser player, then download your .aac file ready to play on iPhone, share to iPad, import into GarageBand, or submit to Apple Podcasts.

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Deep Dive

Opus vs AAC: Streaming-Optimized Open Codec vs Apple Native

Opus is the modern standard for real-time streaming and voice. AAC is Apple's preferred format and the codec the entire Apple ecosystem decodes in hardware. Here is what changes when you convert between them.

iPhone users, podcasters, and iOS developers converting Opus audio to AAC

Opus: Efficient for Streaming, Not Native on Apple

Opus (IETF RFC 6716) is an open, royalty-free codec developed by Xiph.Org and Mozilla, mandated by the WebRTC standard. It achieves excellent quality at low bitrates and ultra-low latency for real-time voice. However, Apple did not include a native Opus decoder in iOS, macOS, or Safari until very recently — iOS 17 and Safari 17 added support, but many devices remain on earlier OS versions that cannot play Opus at all.

iOS native Opus supportiOS 17+ (iPhone XR and later with iOS 17 installed)

Safari Opus supportSafari 17 on macOS Sonoma; not available in older macOS versions

AVFoundationDoes not decode Opus natively in any current iOS version

For reliable playback across all iPhones and iPads regardless of OS version, AAC or MP3 is the safe choice.

AAC: Hardware-Decoded on Every Apple Device

AAC (Advanced Audio Coding) is Apple's preferred audio codec. Every iPhone, iPad, iPod, Mac, Apple TV, HomePod, and Apple Watch has dedicated hardware to decode AAC. The iOS Files app, Music app, Voice Memos, GarageBand, Logic Pro, and AVFoundation all handle AAC natively without any app or codec installation. Apple Podcasts recommends AAC for podcast episode delivery.

TypeLossy compression, hardware-decoded on all Apple devices

Typical bitrate128 to 256 kbps for music; 64 to 96 kbps for voice

Apple PodcastsRecommended format for RSS episode delivery

AAC is also well-supported on Android, Windows, and all modern browsers — making it a solid cross-platform choice.

Quality: Converting Between Two Lossy Codecs

Both Opus and AAC are lossy codecs. Converting Opus to AAC requires decoding the Opus stream and re-encoding as AAC, which introduces a second compression pass. Using a high AAC output bitrate (128 kbps or above) minimizes this additional quality penalty to a level most listeners cannot detect under normal conditions.

Quality impactMinor at high output bitrates (128 kbps AAC or above)

Voice contentEven 64 kbps AAC mono is high quality for speech after conversion from Opus

If preserving maximum quality matters, convert to WAV or FLAC first to get an uncompressed working copy.

When AAC Is the Right Destination Format

AAC is the right choice when the audio needs to play on any iPhone or iPad regardless of iOS version, be submitted to Apple Podcasts, be used in an iOS app via AVFoundation, or be shared with anyone whose primary device is in the Apple ecosystem. For Discord bots or WebRTC, keep Opus.

Use AAC foriPhone, iPad, Safari, Apple Podcasts, GarageBand, Logic Pro, AVFoundation

Keep Opus forDiscord bots, WebRTC, self-hosted streaming, bandwidth-limited delivery

Our converter uses FFmpeg to decode Opus and re-encode as AAC at a high bitrate, minimizing transcoding quality loss.

Benefits

Why Convert Opus to AAC

🍎

Native on Every Apple Device

AAC plays on every iPhone, iPad, Mac, Apple TV, and HomePod without any app or codec — hardware-decoded across the entire Apple product line.

🎙️

Apple Podcasts Ready

Apple Podcasts recommends AAC for RSS episode delivery. Convert Opus recordings to AAC before publishing your feed.

📱

Works in iOS Apps via AVFoundation

AAC is natively supported by AVAudioPlayer and AVPlayer in every iOS version. No custom decoder or dependency needed in your app.

⚡

Fast Conversion

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

Who Uses It

Who Converts Opus to AAC

Podcasters publishing to Apple Podcasts, iOS developers receiving Opus from a server, iPhone users playing Discord recordings, and anyone moving audio from a streaming or voice platform to an Apple device.

iPhone users, podcasters, and iOS developers converting Opus to AAC

iPhone Users Playing Discord Voice Recordings

Discord exports voice channel recordings as Opus files. Opening a .opus file on an iPhone running iOS 16 or earlier shows an error or requires a third-party player. Converting to AAC produces a file that opens in the iOS Files app, plays in the Music app, and can be shared via AirDrop with no additional software on the recipient's iPhone.

iOS Opus supportNative only on iOS 17+; AAC works on every iOS version

Podcasters Publishing to Apple Podcasts

Apple Podcasts recommends AAC as the preferred audio format for episodes delivered over RSS. Podcast creators who record with VoIP tools, WebRTC platforms, or Linux-based setups often end up with Opus files. Converting to AAC before publishing ensures maximum compatibility and meets Apple's format recommendation.

Recommended bitrate128 kbps stereo or 64 kbps mono for voice episodes

iOS Developers Handling Server-Side Opus Audio

iOS apps that receive Opus audio from a WebRTC server, a VoIP platform, or a streaming API cannot pass those files directly to AVAudioPlayer or AVPlayer, which require AAC, MP3, or WAV. Converting server-side before delivery, or providing a conversion step before playback, ensures the audio works through the standard iOS audio stack.

Safari Web Developers Serving Audio

Web developers who serve Opus audio on sites that need to work in Safari on older macOS versions (before Sonoma) or older iOS versions must provide an AAC fallback. Converting Opus assets to AAC covers those Safari versions and enables the standard HTML5 audio element to work on every Apple browser.

Content Creators Moving from Streaming Tools to Apple Devices

Creators who archive content from Twitch, Discord stage channels, or self-hosted streaming servers in Opus format and want to edit or listen to recordings in GarageBand, Logic Pro, or the iOS Voice Memos app need AAC. Apple's creative apps all handle AAC natively without any import conversion step.

Developers Testing Audio on Apple Simulator

iOS and macOS developers who need to test audio playback behavior in Xcode simulator environments use AAC test files because AVFoundation supports AAC in simulator builds. Opus files require additional decoder setup that is not available in the standard simulator configuration.

Converts using FFmpeg on dedicated servers.

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Related Tools

Frequently Asked Questions

Why can't I play Opus files on my iPhone?

iPhones running iOS 16 and earlier do not include a native Opus decoder. iOS 17 added limited Opus support, but AVFoundation — the framework used by the iOS Music app, Files app, and third-party audio players built on standard APIs — does not decode Opus natively even on iOS 17. Converting to AAC produces a file that plays on every iPhone regardless of iOS version.

Does Apple Podcasts accept Opus audio files?

No. Apple Podcasts requires episodes to be delivered as AAC (.m4a) or MP3. Opus is not a supported format for Apple Podcasts RSS feeds. Convert Opus episodes to AAC before submitting or updating your feed.

Will converting Opus to AAC cause quality loss?

A small quality penalty occurs because both Opus and AAC are lossy codecs. Decoding Opus and re-encoding as AAC introduces a second compression pass. Using a high AAC output bitrate (128 kbps or above) keeps this additional penalty minimal and undetectable in most listening scenarios.

Can I use the converted AAC in GarageBand or Logic Pro?

Yes. GarageBand and Logic Pro both import AAC natively. Drop the converted .aac file into a GarageBand project or Logic Pro session and it will appear as an audio region ready to edit, trim, or mix.

Does the AAC file play in Safari?

Yes. Safari on macOS and iOS has always supported AAC natively. Unlike Opus, which requires Safari 17 or later, AAC works in every version of Safari without any compatibility concern.

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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Upload your file above and get an Apple-ready AAC file in seconds.