WAV to M4A
Convert WAV audio to M4A (AAC) directly in your browser. Smaller files than MP3 at the same quality. No uploads to a server, no account required.
Drop your WAV file here or click to browse
Accepted: .wav, audio/wav
What This Tool Does
Converts WAV audio files to M4A (AAC) format in your browser without uploading. M4A uses the AAC codec, which delivers better quality-to-size ratio than MP3 at equal bitrates.
Who This Is For
- Apple ecosystem users who prefer M4A for iTunes, iPhone, and Apple Music compatibility
- Podcast producers targeting Apple Podcasts who want AAC efficiency
- Audio engineers who need smaller files than WAV without the MP3 quality trade-off
- iOS app developers testing audio playback with the AAC codec
Example: Input: A 120 MB WAV recording exported from Logic Pro or GarageBand → Output: A compact M4A file, typically 8–15x smaller, optimized for Apple devices
✓ Done!
Your M4A file is ready.
💡 Need MP3 instead? Use the WAV to MP3 converter. To trim the audio first, use the Audio Trimmer to cut the recording to the section you need before converting.
Related Guides & Tutorials
WAV vs M4A — Detailed Comparison
| Property | WAV | M4A (AAC) |
|---|---|---|
| Compression | Uncompressed (PCM) | Lossy compression (AAC) |
| Typical file size (3-min song) | ~30 MB | ~2.8 MB at 128 kbps |
| Audio quality | Lossless — perfect reproduction | Excellent — better than MP3 at same bitrate |
| Editing | Ideal — no generation loss | Degrades slightly with each re-encode |
| Apple ecosystem | Supported but large | Native format — iPhone, iPad, Mac, iTunes |
| Windows/Android | Universal | Supported on Windows 10+, modern Android |
| Web browsers | Universal | Universal — all modern browsers |
When to Use M4A Instead of MP3
- Apple ecosystem — M4A is the native format for iPhones, iPads, Macs, and iTunes. No conversion needed on the receiving end.
- Smaller files — AAC achieves better compression than MP3. A 128 kbps M4A sounds like a 160–192 kbps MP3, saving 20–30% file size.
- Modern devices — if your audience uses current phones, tablets, and computers, M4A works everywhere.
- Podcasts and audiobooks — Apple Podcasts uses M4A natively. Audiobook format (.m4b) is based on M4A.
- Use MP3 instead when — you need to support older car stereos, legacy MP3 players, or devices where AAC support is uncertain.
Audio Conversion Workflow
WAV to M4A is the export step — pair it with these tools for a complete workflow:
- Trim the WAV file first — remove silence and unwanted sections before converting
- Record audio in the browser — captures audio you can then convert to M4A
- Convert WAV to MP3 — if you need maximum device compatibility instead
- Convert any audio format to MP3 — handles FLAC, OGG, AAC and more
- Transcribe the audio to text — speech-to-text directly in the browser
Frequently Asked Questions
How It Works
🔒 Privacy & Security
WAV files are read from your local storage using the browser File API and converted using the WebCodecs API — entirely within your browser tab. No audio data is uploaded to any server. This matters for voice recordings of meetings, interviews, or personal content that you wouldn't want stored on third-party servers.