Audio Conversion
Convert AAC to M4A Online — Free
Fast, free AAC to M4A converter. No registration required.
或从以下导入
200万+文件已转换
数千用户的信赖之选
安全传输
HTTPS 加密上传
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文件处理后自动删除
无需注册
即刻开始转换
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任何浏览器，任何设备
如何转换
1
Upload your .aac file by dragging it into the upload area or clicking to browse.
2
Choose your output settings. The default settings work great for most files.
3
Click Convert and download your .m4a file when it's ready.
什么是 AAC？
AAC is an audio coding standard designed to be the successor of MP3. It provides better sound quality at similar bit rates.
格式详情
- 全称
- Advanced Audio Coding
- 扩展名
- .aac
主要特点
- Superior to MP3
- Streaming optimized
- Wide support
- Efficient compression
什么是 M4A？
M4A is an audio-only MPEG-4 container, commonly using AAC encoding. It provides better quality than MP3 at similar file sizes.
格式详情
- 全称
- MPEG-4 Audio
- 扩展名
- .m4a
主要特点
- Better than MP3
- Apple ecosystem
- AAC encoding
- Metadata support
AAC 与 M4A 对比
| 特性 | AAC | M4A |
|---|---|---|
| 全称 | Advanced Audio Coding | MPEG-4 Audio |
| 扩展名 | .aac | .m4a |
| 最适合 | Superior to MP3 | Better than MP3 |
常见问题
Converting between lossless formats preserves perfect quality. When converting to lossy formats, our optimized encoding minimizes any audible difference. You can adjust bitrate to control quality vs. file size.
We preserve ID3 tags, album art, and metadata when both AAC and M4A support them. Some metadata may not transfer between incompatible formats.
Pro users can batch convert multiple audio files simultaneously. Free users convert one file at a time with up to 5 free conversions per day.
We support all standard sample rates from 8kHz (voice) up to 192kHz (studio quality). The default preserves your source file's sample rate.
Yes. Our audio converter handles music, podcasts, voice memos, and audiobook files. For podcasts, we recommend MP3 at 128-192kbps for the best balance of quality and file size.