Convert Waveform Audio (.wav) to Advanced Audio Coding (.aac) online for free. Fast, secure audio conversion with no watermarks or registration.
Conversion settings — add a file to adjust
Upload your .wav file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .aac file when it's ready.
WAV stores uncompressed PCM audio in Microsoft's RIFF container, delivering bit-perfect sound at the cost of large file sizes — roughly 10 MB per minute for CD-quality stereo. AAC (Advanced Audio Coding), standardized as part of MPEG-2 and later MPEG-4, is the successor to MP3 and delivers superior audio quality at equivalent bitrates. AAC is the default audio codec for iTunes, YouTube, Apple Music, and most modern streaming platforms.
Converting WAV to AAC applies perceptual coding to eliminate audio information that human hearing cannot detect, typically achieving 10:1 compression ratios while maintaining near-transparent quality at 256 kbps. This makes AAC the ideal format when you need to distribute, stream, or store large WAV collections efficiently.
Uncompressed WAV files are impractical for distribution. A 50-minute album occupies roughly 500 MB as WAV but only 50-80 MB as AAC at 256 kbps with virtually indistinguishable quality. Streaming platforms, podcast hosts, and mobile music libraries all benefit from AAC's efficient compression. Apple's entire ecosystem — from iPhones to AirPods to HomePods — decodes AAC natively with hardware acceleration.
AAC also outperforms MP3 at every bitrate, particularly below 128 kbps where MP3 introduces audible artifacts. For podcasts, audiobooks, and background music, AAC at 96-128 kbps sounds noticeably cleaner than MP3 at the same rate, saving bandwidth and storage without perceptible quality loss.
FFmpeg decodes the WAV's PCM stream and encodes it using the native AAC encoder (or libfdk_aac if available for higher quality). The encoder applies modified discrete cosine transform (MDCT), psychoacoustic modeling, and Huffman coding to compress the audio. Output profiles include AAC-LC (Low Complexity — widest compatibility), HE-AAC (High Efficiency — for bitrates below 64 kbps), and HE-AACv2 (adds parametric stereo for ultra-low bitrates). The resulting raw AAC stream is typically wrapped in an M4A (MPEG-4 Part 14) or ADTS container.
At 256 kbps AAC-LC, most listeners cannot distinguish the output from the original WAV in blind tests — this is considered transparent quality. At 192 kbps, subtle differences may appear on critical listening equipment. At 128 kbps, AAC still outperforms MP3 at 192 kbps. Below 96 kbps, use HE-AAC or HE-AACv2 to maintain acceptable quality. The conversion is one-way: information discarded by AAC encoding cannot be recovered.
| Device | WAV | AAC |
|---|---|---|
| Windows PC | Native | Partial |
| macOS | Partial | Native |
| iPhone/iPad | Partial | Native |
| Android | Partial | Partial |
| Linux | Partial | Partial |
| Web Browser | Native |
Resolution: N/A
Bitrate: 320 kbps
OGG Vorbis preferred
Resolution: N/A
Bitrate: 256 kbps
AAC format required
Resolution: N/A
Bitrate: 128 kbps
Lossless FLAC/WAV for best quality
Resolution: N/A
Bitrate: 128 kbps
MP3 mono for spoken word
WAV to AAC is the standard path from studio masters to distribution-ready audio. AAC at 256 kbps delivers transparent quality at a fraction of the file size, making it the premier lossy format for Apple-centric workflows and modern streaming.
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| No |
| Χαρακτηριστικό | WAV | AAC |
|---|---|---|
| Πλήρες όνομα | Waveform Audio File Format | Advanced Audio Coding |
| Επέκταση | .wav | .aac |
| Ιδανικό για | Lossless quality | Superior to MP3 |