M4A 转 WV 转换器
A free M4A to WV converter for MPEG-4 Audio files. Browser-based pairs here usually run in this tab, with no file upload.
将你的 M4A 文件拖放到这里
or 浏览你的设备 · 粘贴快捷键 Ctrl+V
Accepts .m4a files. You can queue several files; each is processed one after another on your own device.
你的文件永远不会离开这台设备 —— 没有上传，也就没有服务器可以从中删除它们。
- 01
添加你的 M4A 文件
将文件拖放到上方的方框里，或点击浏览选择。它们会直接从磁盘读取 —— 不会发送到任何地方。
- 02
检查设置
WV is already selected. Open the gear icon on any row if you want to change quality, dimensions or codec before converting.
- 03
下载你的 WV
点击转换，等待该行处理完成。转换多个文件时，可以将它们全部打包为一个 ZIP 一次性下载。
M4A
MPEG-4 Audio只容纳音频的 MP4 容器格式，通常是 AAC，有时也是无损的 ALAC。这是 iTunes 抓取音乐时使用的格式，也是苹果设备期望的格式，对封面图片和标签有完善的支持。
- 开发者
- Apple / MPEG
- 发布时间
- 2001
- 扩展名
- .m4a
- MIME 类型
- audio/mp4
- 压缩方式
- 有损或无损
WV
WavPack一种开放的无损编解码器，拥有独特的混合模式：可以把文件拆分成一个较小的有损部分，加上一个能将其完美还原的校正文件。
- 开发者
- David Bryant
- 发布时间
- 1998
- 扩展名
- .wv
- MIME 类型
- audio/x-wavpack
- 压缩方式
- 有损或无损
- 规范
- 开放
关于 M4A 转 WV 的常见问题
这个 M4A 转 WV 转换器是免费的吗？
是的。在这里把 M4A 转换为 WV 完全免费，无需账号、没有水印、也没有每日次数限制。处理在你自己的设备上完成，因此不存在需要转嫁给你的服务器成本。
我的 M4A 文件会被上传到任何地方吗？
For browser-based pairs, your file is read locally and converted by ffmpeg in this tab. No file payload is uploaded; you may still see analytics and engine downloads in network logs.
M4A 转 WV 有文件大小限制吗？
There is no imposed upload cap when it runs in-browser, but each conversion still depends on your device and browser memory. Large videos are the first practical limit, then memory-heavy documents or images.
把 M4A 转换为 WV 会损失质量吗？
It depends on your selected settings and codec path. Many engines can write either lossy or lossless output for WV, so you can usually increase quality if this file is your final version.
可以一次把多个 M4A 文件转换为 WV 吗？
Yes. Drop in several files and each gets its own row; they are processed one after another on your device. You can download them one by one or as one ZIP.
M4A 转 WV 能在手机、Mac 或 Chromebook 上使用吗？
Most modern browsers on Windows, macOS, Linux, ChromeOS, Android and iOS work. Very large videos are often more reliable on desktop or a browser with more memory.
Why do some conversions take longer on first run?
The conversion engine has to download first. Small codec bundles are fast, while ffmpeg is commonly 12–30 MB; later conversions of similar type use the cached engine.
I converted a file and the output is blank or unusable. What should I check?
Start over with default settings, then change one option at a time (quality, bitrate, page size, or codec) to isolate what changed behavior. If it keeps failing, retry with a smaller file and confirm the source format matches the pair.
将其他格式转换为 WV
此处共有 41 种格式可以转换为 WV。
将 M4A 转换为其他格式
一个 M4A 文件可以转换为以下任意一种格式。