Audio Converter

Shrink Uncompressed WAV Files Without Sacrificing Clarity

WAV files are massive. AAC delivers near-identical audio at a fraction of the size — the codec behind every Apple Music track, iPhone ringtone, and YouTube stream. Upload your WAV and get a compact AAC ready to share, stream, or store.

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Shrink Uncompressed WAV Files Without Sacrificing Clarity

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.

Drop your audio file here

or click to browse

Choose File

Compact device storage with a music collection

Cut File Size by Up to 10x Compared to WAV

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Cut File Size by Up to 10x Compared to WAV

A 5-minute stereo WAV at CD quality is roughly 50 MB. The same audio encoded to AAC at 256 kbps is around 10 MB — with quality that most listeners cannot distinguish from the original in a blind test. Smaller files mean faster uploads, less storage consumed, and quicker streaming starts.

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The Native Format for Every Apple Device

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The Native Format for Every Apple Device

AAC is the default audio codec for the Apple ecosystem. iPhone, iPad, Mac, Apple Watch, Apple TV, and AirPods all decode AAC natively and efficiently. iTunes, Apple Music, and GarageBand all use AAC for imports, exports, and streaming. Converting WAV to AAC means your audio is ready for any Apple device the moment the download finishes.

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Ready for YouTube, Spotify, and Every Streaming Platform

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Ready for YouTube, Spotify, and Every Streaming Platform

YouTube, Spotify, Apple Music, and Amazon Music all transcode uploaded audio to AAC or a derivative at some point in their pipeline. Uploading AAC directly skips a re-encode step and preserves your audio closer to the intended quality. For podcast hosting, video production, and social media content, AAC is the most broadly accepted compressed audio format.

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How It Works

Three steps from WAV to AAC

Upload your WAV file

Drop any WAV file onto the tool or click to browse. Studio recordings, field recordings, DAW exports, and voice memos are all accepted.

Convert to AAC

Click "Convert". FFmpeg reads the PCM data from the WAV and encodes it as AAC at a high bitrate to preserve as much of the original quality as possible.

Download your AAC file

Preview the output in the browser player, then download your .aac file ready to add to Apple Music, upload to YouTube, share with collaborators, or sync to any device.

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Deep Dive

WAV vs AAC: Lossless Archive vs Efficient Delivery

WAV stores every sample without compression. AAC uses psychoacoustic modelling to discard audio data the ear cannot perceive, achieving a much smaller file with near-transparent quality.

Audio engineers, musicians, and content creators working with audio files

WAV: Uncompressed PCM, Perfect for Recording and Editing

WAV stores audio as raw PCM samples with no compression applied. Every bit of the original signal is preserved, making WAV the standard for recording studios, DAWs, broadcast production, and audio mastering. The trade-off is file size: a single 4-minute song at 44.1 kHz / 16-bit stereo is around 40 MB — roughly ten times larger than the same song in AAC.

TypeUncompressed PCM (lossless)

Typical size~10 MB per minute of stereo audio at CD quality

Best forRecording, editing, mastering, archiving

WAV is the right format to keep for editing. Convert to AAC only for delivery, sharing, or playback on portable devices.

AAC: Psychoacoustic Compression for Efficient Delivery

AAC (Advanced Audio Coding) was designed as the successor to MP3 by the MPEG group. It uses psychoacoustic models to identify audio components the human ear cannot perceive at a given bitrate and discards them. At 256 kbps, AAC is considered transparent by most listeners — the quality difference from the original is not detectable in a blind test. AAC is the native codec for the Apple ecosystem, YouTube, and most modern streaming services.

TypeLossy compression (psychoacoustic)

Typical bitrate128 to 320 kbps; 256 kbps considered transparent

Best forDelivery, streaming, portable playback, Apple devices

AAC at 256 kbps is the quality level used by Apple Music for its lossless-adjacent streaming tier.

Quality: What "Lossless to Lossy" Actually Means

Converting WAV to AAC is a one-way lossy step. The encoder applies a perceptual model to decide which frequency components to discard, encodes the rest, and writes a compressed bitstream. At 256 kbps or higher, the discarded components are below the threshold of human hearing in most content. At lower bitrates (128 kbps and below), artefacts may appear on complex material like cymbals or transient-rich passages.

256 kbpsTransparent for most music — recommended

192 kbpsGood quality for speech, podcasts, and less complex music

128 kbpsAcceptable for voice; audible artefacts on complex music

Keep the original WAV. You cannot reconstruct the lossless audio from the AAC file after conversion.

AAC vs MP3: Why AAC Is Usually the Better Choice

AAC was designed to fix MP3's technical limitations. It supports more audio channels (up to 48), higher sample rates (up to 96 kHz), and achieves better quality at the same bitrate through improved psychoacoustic models and a more efficient entropy coder. The only advantage MP3 retains is compatibility with older hardware that predates AAC.

AAC at 128 kbpsRoughly equivalent quality to MP3 at 160–192 kbps

CompatibilityAAC is native on all iOS, Android, macOS, and Windows devices

Legacy devicesPre-2005 car stereos and CD players may require MP3 instead

Our converter uses FFmpeg to encode WAV to AAC at a high bitrate, preserving as much of the original quality as possible.

Benefits

Why Convert WAV to AAC

📱

Native on Apple Devices

AAC is the default audio codec on iPhone, iPad, Mac, Apple Watch, and Apple TV — plays without any additional software.

🗜️

Up to 10x Smaller

A 5-minute WAV at CD quality is ~50 MB. The same audio in AAC at 256 kbps is ~10 MB — a fraction of the storage footprint.

🎵

Streaming-Ready

YouTube, Spotify, Apple Music, and Amazon Music all use AAC or AAC-derived codecs in their delivery pipelines.

🌐

Universal Compatibility

AAC plays on iOS, Android, Windows, macOS, Linux, and virtually every modern media player and browser.

Who Uses It

Who Converts WAV to AAC

Musicians sharing recordings, podcasters uploading episodes, video editors exporting audio tracks, and developers building mobile apps that ship audio assets.

Musicians, podcasters, video editors, and developers working with audio

Musicians and Bands Sharing Recordings

Studio sessions and home recordings are typically saved as WAV for maximum quality during production. Converting to AAC before sharing means collaborators, managers, and fans get a file that plays instantly on any phone or computer without the 50 MB download that comes with a raw WAV.

Podcasters Preparing Episode Audio

Many DAWs export podcast audio as WAV by default. Most podcast hosting platforms accept WAV but charge storage by the megabyte. Converting to AAC at 128 kbps or higher reduces each episode's file size by up to 10x without any perceptible quality difference for speech content.

Recommended bitrate for speech128 kbps AAC

Video Editors Preparing Audio Tracks

Video editors often work with WAV audio tracks during editing for quality reasons, then need to export a compressed audio track for web delivery or social media. AAC is the standard audio codec inside MP4 containers — the universal video format for YouTube, Instagram, and TikTok.

iOS and Android App Developers

Sound effects, music beds, and UI audio assets bundled into mobile apps need to be as small as possible to keep the app download size down. Converting WAV assets to AAC before shipping them in the app bundle can shave megabytes off the final package size.

Content Creators Uploading to YouTube

YouTube re-encodes all uploaded audio to AAC internally. Providing AAC as the source audio means YouTube can retain more of the original quality during its own encoding pass, rather than compressing an already-uncompressed WAV through additional transcoding.

Music Producers Sending Client Deliverables

Clients reviewing mixes and arrangements do not need the full WAV — they need a file that plays on their phone without filling up their storage. AAC at 256 kbps gives clients a near-transparent reference copy while keeping the file small enough to attach to an email or share via a messaging app.

Converts using FFmpeg on dedicated servers.

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Related Tools

Frequently Asked Questions

Does converting WAV to AAC reduce quality?

Yes — AAC is a lossy format, so the conversion is a one-way process that discards audio data the ear typically cannot perceive. At 256 kbps, the quality loss is considered transparent by most listeners in blind tests. At lower bitrates (128 kbps), artefacts may appear on complex musical content but are rarely noticeable on speech.

Should I keep the original WAV after converting?

Yes. You cannot recover the lossless audio from an AAC file after conversion. Keep the WAV as your master archive and use the AAC only for distribution, sharing, or playback on portable devices.

Will the converted AAC play on my iPhone?

Yes. AAC is the native audio codec for the entire Apple ecosystem. iPhone, iPad, Mac, Apple Watch, and Apple TV all play AAC natively without any additional software or codec.

What bitrate does the converter use?

The converter uses FFmpeg with a high AAC bitrate to preserve as much of the original quality as possible. For most music content this produces a transparent result — quality differences from the source WAV are not detectable by most listeners.

Is AAC better than MP3?

Generally yes. AAC achieves better audio quality at the same bitrate compared to MP3, supports more audio channels, and is natively supported on all modern iOS, Android, macOS, and Windows devices. MP3 is only preferable for compatibility with very old hardware such as car stereos and CD players manufactured before 2005.

Is there a file size limit?

The upload limit is 100 MB per file. Most WAV files are within this range, though very long recordings at high sample rates may exceed it.

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Upload your WAV above and get a compact, streaming-ready AAC file in seconds.