What is Audio Conversion?
Audio conversion changes the format or encoding of an audio file — for example, converting a WAV recording to MP3 for sharing, or a FLAC archive to AAC for your phone. Different formats make different trade-offs between file size, audio quality, and device compatibility.
The two main categories are lossless (WAV, FLAC, AIFF, ALAC) which preserve every detail of the original audio, and lossy (MP3, AAC, OGG) which discard inaudible data to achieve much smaller file sizes.
Audio Format Comparison
Here's how the 7 formats supported by this converter compare:
| Format | Type | File Size | Best For | Extension |
|---|---|---|---|---|
| MP3 | Lossy | Small | Sharing, streaming, universal playback | .mp3 |
| WAV | Lossless | Large | Editing, DAW work, maximum compatibility | .wav |
| FLAC | Lossless | Medium | Archival, audiophile listening | .flac |
| AAC | Lossy | Small | Apple devices, better than MP3 at same bitrate | .m4a |
| OGG | Lossy | Small | Open source, Spotify, gaming | .ogg |
| AIFF | Lossless | Large | Apple ecosystem, Pro Tools, Logic Pro | .aiff |
| ALAC | Lossless | Medium | Apple lossless — iPhone, iTunes, Apple Music | .m4a |
For a deeper comparison, see our guides on audio formats explained and lossless vs lossy audio. Need specific conversion help? See how to convert to MP3 or how to convert to WAV.
When to Use Each Format
Sharing & Streaming
MP3 or AAC — small files that play everywhere. Use MP3 for maximum compatibility, AAC for slightly better quality at the same file size.
Archival & Storage
FLAC or ALAC — lossless compression saves 50-60% of space compared to WAV with zero quality loss. Use FLAC for cross-platform, ALAC for Apple.
Editing & Production
WAV or AIFF — uncompressed formats that every DAW and audio editor supports natively. No decoding overhead, instant access to raw samples.
Apple Devices
ALAC or AAC — native Apple formats for iPhone, iPad, iTunes, and Apple Music. ALAC for lossless, AAC for smaller files.
Lossy vs Lossless Audio
Lossless formats (WAV, FLAC, AIFF, ALAC) preserve every bit of the original audio. You can convert between lossless formats freely without any quality loss — it's like renaming a file.
Lossy formats (MP3, AAC, OGG) permanently discard audio data that's theoretically inaudible. The trade-off is dramatically smaller files (often 10x smaller than WAV). At high bitrates (256-320 kbps), most listeners can't tell the difference.
The re-encoding trap: Converting lossy to lossy (e.g., MP3 → AAC) degrades quality further with each conversion. Always start from the highest-quality source. Converting MP3 to FLAC does not improve quality — it just makes the file bigger.
Audio Converter FAQ
Which audio format has the best quality?
Lossless formats (WAV, FLAC, AIFF, ALAC) all preserve the original audio perfectly — no quality difference between them. Among lossy formats, AAC generally sounds better than MP3 at the same bitrate. Choose lossless for archival and editing, lossy for sharing and streaming.
Does converting MP3 to FLAC improve quality?
No. Once audio data is lost during lossy compression (like MP3), it can't be recovered. Converting an MP3 to FLAC just wraps the already-compressed audio in a lossless container — the file gets bigger, but the quality stays the same. Always start from the highest-quality source available.
What bitrate should I use for MP3?
320 kbps is near-transparent quality — most listeners can't tell it apart from lossless. 192 kbps offers a good balance of quality and file size. 128 kbps is acceptable for speech or when file size is critical. Below 128 kbps, quality degrades noticeably.
What's the difference between WAV and FLAC?
Both are lossless — identical audio quality. The difference is file size: FLAC uses lossless compression to reduce files by 50-60% with zero quality loss. WAV is uncompressed and universally compatible. Use WAV for editing and DAW work, FLAC for storage and archival.
Is this audio converter free?
Yes, completely free. No account required, no watermarks, no file limits beyond 250 MB per file and 3 files per batch. The converter runs entirely in your browser using FFmpeg — your files are never uploaded anywhere.
Explore More Music Tools
Remove vocals, change pitch, or find the tempo — all free and private in your browser.