Free Audio Converter Tools
Convert audio between MP3, WAV, FLAC, and more, and turn text or documents into natural speech — all on your device.
Convert between every common audio format
Move between MP3, WAV, FLAC, AAC, M4A, and OGG. Convert a lossless WAV or FLAC to MP3 to save space, or an MP3 to WAV when an app needs uncompressed audio. Everything runs on your device, so your recordings and music stay private.
Turn documents into speech
Text to Speech reads any text aloud in a natural voice, and PDF to Audio and Word to Audio turn a document into something you can listen to on a commute or while your eyes rest. The speech is generated on-device, so the text you convert isn't sent anywhere.
Best audio format for the job
MP3 and AAC are compact and play everywhere — ideal for sharing and portable listening. WAV and FLAC are lossless — best for editing, archiving, or mastering. Convert to the format your target app or device expects without hunting for desktop software.
Private, no-upload audio conversion
Voice memos, interviews, and unreleased tracks are sensitive. Upload-based converters put them on a server; File Transmute converts audio in your browser instead, with no upload and no daily limit, and works offline once loaded.
Not sure which tool you need?
- Audio file too big to send?WAV to MP3 →
- Want the sound from a video?MP4 to MP3 →
- iPhone voice memo won't play?M4A to MP3 →
- Need a document read aloud?Text to Speech →
Audio format guide
| Format | Type | Best for | Watch out for |
|---|---|---|---|
| MP3 | Lossy | The universal choice — music, podcasts, anything you share | Small quality loss; not ideal as an editing master |
| WAV | Lossless (uncompressed) | Recording and editing, short high-quality clips | Very large files; overkill for sharing |
| FLAC | Lossless (compressed) | Archiving music at full quality, smaller than WAV | Not playable on every device or app |
| AAC | Lossy | Apple devices and YouTube — better quality than MP3 at the same size | Slightly less universal than MP3 |
| M4A | Lossy (usually AAC) | iTunes, Apple Music, and iPhone voice memos | Some older players mishandle the container |
| OGG | Lossy (Vorbis) | Games, open-source apps, and streaming | The least widely supported on consumer devices |