Convert WEBM to M4A
Extract the audio from WEBM videos and save it as M4A — ideal for high-quality music and voice recordings for Apple and Android devices.
- No upload — 100% private
- Fast, lossless when possible
- Free & unlimited
- Works on iPhone & Android
Keep this tab open — the conversion runs on your device, nothing is uploaded.
Add more files above to keep converting.
How to convert WEBM to M4A
- 1
Tap Choose files and select one or more WEBM files (or drag them in).
- 2
Check that M4A is selected. Use Advanced options for bitrate, channels or trimming.
- 3
Press Convert. Everything happens on your device — no upload, no waiting in a queue.
- 4
Your M4A downloads automatically. Converting several files? Grab them all as a ZIP.
WEBM vs M4A
Only the sound is kept — the picture is dropped, so the M4A file is far smaller than the WEBM video.
| WEBM | M4A | |
|---|---|---|
| Full name | WebM Video | MPEG-4 Audio (AAC) |
| Type | Video | Audio |
| Compression | Lossy | Lossy |
| Developed by | Apple / MPEG | |
| Introduced | 2010 | 2001 |
| Plays on iPhone | ◐ Partly / with an app | ✓ Yes |
| Plays on Android | ✓ Yes | ✓ Yes |
| Plays on Windows | ✓ Yes | ✓ Yes |
| Plays on Mac | ◐ Partly / with an app | ✓ Yes |
About WEBM and M4A
WEBM: WebM is Google's open video format using VP8/VP9 and Opus. It is built for the web and is what screen recorders and browsers produce.
M4A: M4A is an MPEG-4 container holding AAC audio. It sounds better than MP3 at the same size and is the default format for iPhone voice memos, Apple Music downloads and many Android recorders.
Frequently asked questions
How do I convert WEBM to M4A on my phone?
Will converting WEBM to M4A reduce quality?
Can I convert only part of the WEBM?
Is this WEBM to M4A converter free?
Are my files uploaded to a server?
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