WEBM to M4A Converter
Convert WEBM files to M4A in seconds, right in your browser. Drop in one file or a whole folder, pick your quality settings and download - nothing is uploaded to a server.
Drop WEBM files here
MP3, WAV, FLAC, M4A, OGG, OPUS, AAC, AIFF, WMA, AMR, MP4, MOV & more · Processed on your device - nothing is uploaded
How to convert WEBM to M4A
- Click "Choose files" or drag your WEBM files onto the page.
- Make sure "M4A" is selected as the output format (192 kbps is a good default).
- Optionally click Edit to trim, adjust volume or add effects.
- Click Convert, then Download your M4A files.
Why convert WEBM to M4A?
M4A may be better supported by your device or app. To keep quality, choose a bitrate equal to or higher than the original WEBM.
M4A is best for iPhone, iTunes/Apple Music, YouTube uploads and efficient music storage. Excellent on Apple devices, Android, Windows, browsers and most modern players.
Will I lose quality?
Converting between two lossy formats re-encodes the audio, which can add a small amount of loss. Use a bitrate at least as high as the original (192 kbps or more) to keep it transparent.
WEBM vs M4A
| WEBM | M4A | |
|---|---|---|
| Full name | WebM Audio (Opus) | MPEG-4 Audio (AAC) |
| Type | lossy | lossy |
| Best for | web apps, HTML5 audio and browser-based recording | iPhone, iTunes/Apple Music, YouTube uploads and efficient music storage |
| Typical size | ~0.9 MB at 128 kbps per minute | ~1.4 MB at 192 kbps per minute |
| Compatibility | Chrome, Firefox, Edge, Android, VLC. Safari 15+. | Excellent on Apple devices, Android, Windows, browsers and most modern players. |
| Developed by | Google (2010) | MPEG / Apple (2001) |
WEBM to M4A: questions
How do I convert WEBM to M4A?
Open this page, add your WEBM file, make sure M4A is selected as the output format and click Convert. Your M4A file is ready to download in seconds.
Will converting WEBM to M4A lose quality?
Converting between two lossy formats re-encodes the audio, which can add a small amount of loss. Use a bitrate at least as high as the original (192 kbps or more) to keep it transparent.
Is this WEBM to M4A converter free and safe?
Yes. It's free with no watermark or sign-up. Files are processed locally in your browser, so your audio is never uploaded or stored on our servers.
Can I convert many WEBM files to M4A at once?
Yes - add up to 5 files at a time on the free plan (unlimited with Pro), convert them all with one click and download them as a ZIP.
What is the difference between WEBM and M4A?
WEBM (WebM Audio (Opus)) is a compressed (lossy) format, opus audio in a WebM container - the native format of browser recordings and YouTube audio streams. M4A (MPEG-4 Audio (AAC)) is a compressed (lossy) format: aAC audio in an MPEG-4 container. Better quality than MP3 at the same bitrate and the native format of Apple Music and iTunes.
Does it work on Mac, Windows, iPhone and Android?
Yes. The WEBM to M4A converter runs in any modern browser - Chrome, Safari, Edge or Firefox - on desktop and mobile. No software to install.