Audio Converter
Convert between MP3, WAV, OGG, FLAC, AAC and OPUS instantly. All powered by FFmpeg WebAssembly — entirely in your browser, files never leave your device.
Drag 'n' drop files here, or
click to select files
.mp3, .wav, .ogg, .flac, .aac, .m4a, .wma, .opus, .oga
Select the output format and click Convert
//format_comparison
Audio format comparison
Audio formats trade quality, file size, and compatibility differently. Here's how the six most common formats compare for a typical 4-minute song.
| Format | Type | Bitrate | Size (4 min) | Royalty-free | iOS support | Best for |
|---|---|---|---|---|---|---|
| MP3 | Lossy | 128-320 kbps | ~4 MB | Yes (patents expired 2017) | Native | Universal playback, podcasts, downloads |
| WAV | Uncompressed PCM | 1411 kbps (CD quality) | ~40 MB | Yes | Native | DAW editing, mastering, sampling |
| OGG (Vorbis) | Lossy | ~160 kbps (q5 default) | ~4 MB | Yes (Xiph) | None — iPhone/iPad reject Vorbis | Game engines (Godot), Wikipedia, Linux |
| FLAC | Lossless compression | ~1000 kbps (varies) | ~25 MB | Yes (Xiph) | iOS 11+ (Files, Apple Music import) | Archival, Hi-Fi, mastering masters |
| AAC / M4A | Lossy | 128-256 kbps | ~5 MB | No (patent pool) | Native (preferred Apple codec) | Apple Music, iPhone, streaming uploads |
| OPUS | Lossy (modern) | 32-510 kbps | ~3 MB | Yes (IETF) | iOS 17+ partial | Voice (Discord, WhatsApp), low-bitrate streaming |
//when_to_convert
When to convert audio
Common scenarios where converting audio format solves a real workflow or compatibility problem.
MP3 to WAV for editing in Audacity, Pro Tools, or Logic Pro
DAWs work most reliably with uncompressed PCM. Loading an MP3 directly forces a decode every time you scrub or render. Converting to WAV up front gives you a stable file with sample-accurate editing and zero further generational loss during processing.
OGG to AAC for iPhone — Vorbis isn't supported on iOS
Apple's CoreAudio framework has no Vorbis decoder, so iPhone and iPad refuse to play OGG files. Converting to AAC (Apple's preferred codec) makes audio from Godot games, Wikipedia, or Bandcamp downloads playable on every Apple device and acceptable for Apple Music uploads.
WAV to FLAC for archival — same quality, half the size
FLAC is lossless — bit-perfect to the source WAV — but uses linear prediction compression to cut file size roughly in half. A 40 MB WAV becomes ~20-25 MB FLAC with zero quality difference, perfect for long-term storage of master recordings.
M4A or AAC to MP3 for legacy players, car stereos, old phones
Pre-2010 MP3 players, many car stereos, and older feature phones don't support AAC/M4A. Converting to MP3 at 192kbps gives you near-transparent quality in a format that plays in literally any device sold in the last 25 years.
AAC iPhone voice memos to WAV for transcription and editing
iPhone voice memos save as M4A/AAC, which Whisper, Otter, and other transcription tools sometimes mishandle. Converting to 16-bit WAV gives you the canonical input format that every speech-to-text engine and audio editor expects.
//specific_tools
Specific Converters
Need a dedicated tool for a specific format pair? Each page has format-specific FAQs, technical details, and use cases.
WAV to MP3
Convert WAV audio to compact MP3 files for easy sharing.
→FLAC to MP3
Convert lossless FLAC audio to compact MP3 for any device.
→M4A to MP3
Convert Apple M4A audio files to universally compatible MP3.
→AAC to MP3
Convert AAC audio files to widely compatible MP3 format.
→OGG to MP3
Convert OGG Vorbis audio files to universally supported MP3.
→WMA to MP3
Convert Windows Media Audio files to universal MP3 format.
→MP3 to OGG
Convert MP3 audio files to open-source OGG Vorbis format.
→MP3 to AAC
Convert MP3 audio files to AAC format for Apple and streaming services.
→MP3 to FLAC
Convert MP3 audio files to FLAC lossless format for archival and DAW workflows.
→WAV to OGG
Convert uncompressed WAV audio to compact open-source OGG Vorbis format.
→WAV to AAC
Convert uncompressed WAV audio to AAC format for Apple devices and streaming.
→WAV to FLAC
Convert uncompressed WAV audio to FLAC lossless compressed format.
→OGG to WAV
Convert OGG Vorbis audio to uncompressed WAV for DAW editing and professional workflows.
→OGG to AAC
Convert OGG Vorbis audio to AAC format for Apple devices and streaming services.
→MP3 to WAV
Convert MP3 audio to uncompressed WAV for editing and professional audio workflows.
→OGG to FLAC
Convert OGG Vorbis to FLAC lossless format for archival.
→AAC to WAV
Convert AAC audio to uncompressed WAV for editing in DAWs and audio tools.
→AAC to OGG
Convert AAC audio to OGG Vorbis for open-source ecosystems and Linux compatibility.
→AAC to FLAC
Convert AAC audio to FLAC lossless format for archival.
→FLAC to WAV
Convert FLAC lossless audio to uncompressed WAV for DAW editing and CD authoring.
→WMA to WAV
Convert WMA (Windows Media Audio) to uncompressed WAV PCM for editing and archival.
→WMA to OGG
Convert WMA (Windows Media Audio) to OGG Vorbis — open-source, royalty-free, smaller than MP3.
→WMA to AAC
Convert WMA (Windows Media Audio) to AAC for iTunes, iPhone, and modern Apple audio workflows.
→WMA to FLAC
Convert WMA (Windows Media Audio) to FLAC for lossless archival in audiophile-friendly libraries.
→M4A to WAV
Convert M4A (AAC) audio to uncompressed WAV for editing in DAWs, broadcast, and forensic workflows.
→M4A to OGG
Convert M4A (AAC) to OGG Vorbis for open-source media libraries, game engines, and Linux ecosystems.
→M4A to AAC
Extract the raw AAC audio stream from M4A containers — useful for ADTS streaming and broadcast.
→M4A to FLAC
Convert M4A (AAC) audio to FLAC for lossless archival and audiophile-friendly libraries.
→FLAC to OGG
Convert lossless FLAC to OGG Vorbis for streaming, game engines, and royalty-free distribution.
→FLAC to AAC
Convert lossless FLAC to AAC for Apple ecosystem playback, iPhone, iPad, and Apple TV.
→Opus to MP3
Convert Opus audio to MP3 for legacy device compatibility — car stereos, old MP3 players, and DJ software.
→Opus to WAV
Convert Opus voice notes and audio to uncompressed WAV for transcription, editing, and forensic workflows.
→Opus to OGG
Convert Opus audio to OGG Vorbis for game engines and players that don't speak Opus.
→Opus to AAC
Convert Opus audio to AAC for Apple ecosystem playback — iPhone, iPad, Apple TV, CarPlay.
→Opus to FLAC
Convert Opus audio to FLAC to stop further generational loss in re-edits and archival.
→//related_hubs
Other converters
//faq
Frequently Asked Questions
- MP3 vs WAV vs FLAC vs AAC — which audio format should I use?
- Use MP3 for distribution and downloads (universal compatibility). Use WAV for DAW editing, mastering, and sampling — uncompressed and edit-friendly. Use FLAC for archival of lossless masters — same quality as WAV, half the file size. Use AAC for the Apple ecosystem (iPhone, iPad, Apple Music) — slightly more efficient than MP3 at the same bitrate.
- What bitrate should I use for podcasts, music, or voice?
- For voice and podcasts: 64-96 kbps mono MP3 or 32-64 kbps Opus is plenty — voice doesn't need fidelity. For music distribution: 192 kbps MP3 or 128 kbps AAC is transparent for most listeners. For audiophile streaming: 320 kbps MP3 or 256 kbps AAC. For mastering and archival: don't use lossy at all — use FLAC or WAV.
- Why doesn't my iPhone play OGG files?
- iOS doesn't include a Vorbis decoder — Apple's CoreAudio framework simply doesn't support OGG playback. This is a deliberate Apple decision, not a technical limitation. Converting OGG to AAC (Apple's native codec) or MP3 (universal) makes the audio playable on every iPhone and iPad immediately.
- Is FLAC really better than MP3?
- FLAC is lossless — bit-perfect identical to the original PCM. MP3 is lossy and discards inaudible data permanently. For most listeners on consumer headphones, 320 kbps MP3 is indistinguishable from FLAC in blind tests. But FLAC matters for editing (no further generational loss), archival (perfect master), and Hi-Fi setups where source quality propagates through expensive DACs and amps. For casual listening, MP3 is fine; for working with audio, FLAC.
- What's the difference between a codec and a container?
- The codec is the compression algorithm (MP3, AAC, FLAC, Opus, Vorbis) that encodes the actual audio data. The container is the file wrapper (.mp3, .m4a, .ogg, .flac, .opus) that stores the encoded stream plus metadata like artist, album, cover art. AAC audio in an M4A container is the same audio inside an .aac (ADTS) file — different wrapper, same codec.
- Are my audio files private?
- Yes. Conversion runs entirely in your browser via FFmpeg WebAssembly. Your audio files never leave your device — no upload, no server processing, no logging, no telemetry.