Audio to M4A
Convert audio or extract the first video audio track as M4A.
Drop your files here
Make something new. Keep everything private.
Multiple files welcome · processed one at a time
Select a tool to see its supported formats and conversion limits. Large files may exceed your browser’s memory.
Before processing large files
On phones and tablets, start with files under 20 MiB and keep this tab in the foreground. Video, OCR and 3D operations can use several times the input size in memory. Desktop browsers generally have more room, but the 128 MiB job limit is not a guarantee that every file will fit. Smaller batches reduce memory pressure.
Supported input formats
- MPEG Audio Layer III (.mp3)
- Waveform audio (.wav)
- Free Lossless Audio Codec (.flac)
- Ogg audio (.ogg)
- Opus audio (.opus)
- MPEG-4 audio (.m4a)
- Advanced Audio Coding (.aac)
- Audio Interchange File Format (.aiff)
- Windows Media Audio (.wma)
- MPEG-4 video (.mp4)
- QuickTime movie (.mov)
- Matroska video (.mkv)
- WebM video (.webm)
- Audio Video Interleave (.avi)
- MPEG-4 video (.m4v)
- MPEG video (.mpeg)
- MPEG video (.mpg)
- Ogg video (.ogv)
- MPEG transport stream (.ts)
Output format
MPEG-4 audio (.m4a)
Support applies to this conversion direction. Check the limits below for features that may change or be discarded.
Compare all supported formats and conversion limits →How to use Audio to M4A
- Add your supported file using the chooser or drop zone.
- Review the settings and conversion limits before processing.
- Select Convert files, then download the result.
What to expect
- Single-threaded FFmpeg. Large files can exceed browser memory; total job input is limited to 128 MiB.
- DRM is unsupported. Decoder support depends on the source codec; conversion failure is reported. First video/audio stream only; subtitles, chapters and attachments are not copied.
Engine: ffmpeg. The engine may need a first-use download. Your file stays in this browser session.Check conversion engines and offline requirements.
Conversion settings
These settings are available in the converter above.
- Start time (seconds)
- Minimum: 0. Maximum: 86400. Default: 0.
- Duration (seconds; 0 means to end)
- Minimum: 0. Maximum: 86400. Default: 0.
About this conversion
Is audio to m4a free?
Yes. This tool runs on your device without an account or a conversion fee.
Are files uploaded during conversion?
File processing happens locally in your browser. Engines may download their code on first use; your input files are not sent to a conversion server. Read how file privacy works.
What if conversion fails?
Check that the file matches a supported input, review the engine’s limitations and try a smaller representative file. If the engine cannot load, check its engine assets and browser requirements. The app reports failures without switching to a remote converter.
Continue with your output
These tools accept this tool’s output format. Each step has its own settings and fidelity limits.
- Audio to MP3
Convert audio or extract the first video audio track as MP3.
- Audio to WAV
Convert audio or extract the first video audio track as WAV.
- Audio to FLAC
Convert audio or extract the first video audio track as FLAC.
- Audio to Ogg Vorbis
Convert audio or extract the first video audio track as OGG.
- Audio to Opus
Convert audio or extract the first video audio track as OPUS.
- Create TAR.GZ
Bundle selected files into a gzip-compressed USTAR archive.